Sun Lee

Field research and strategic insights on space, AI infrastructure, industry, and the U.S.-China technology race.

[Sun Lee @SunLeeReport]

https://t.co/KMt9G1gDp9

[Sun Lee @SunLeeReport]

Visited Starbase in January 2025. F-150s and Mustangs in the parking lot.
Came back in 2026. Rows of Cybertrucks as far as you can see.
Sure, Cybertruck sales were struggling. Sure, Musk said a pressurized version goes to the Moon and Mars. Believe what you want.
But the place physically transformed in 12 months. That part nobody can argue with.

[Sun Lee @SunLeeReport]

The Ultimate Rocket Engine: Raptor 3 vs BE-4

SpaceX Raptor 3: Pushing the limits of power density and mass efficiency (~280-300 tf)

Blue Origin BE-4: Ensuring maximum reliability with an optimized conservative design (640,000 lbf / 2,847 kN, approx. 290 tf converted)

Two different philosophies. One goal: orbit.

[Sun Lee @SunLeeReport]

https://t.co/n6mgOeZzd9

[Sun Lee @SunLeeReport]

@boringcompany @WestgateVegas Prufrock-2 just punched through Vegas like Starship punches through atmosphere. Same energy. Different dirt. 🚇🚀

[Sun Lee @SunLeeReport]

Vegas Loop as a prototype for off-world infrastructure. Still think about this.

[Sun Lee @SunLeeReport]

Rode the Vegas Loop during my visit. Couldn't stop thinking — what if this is less about traffic and more about proving that tunnel networks can be built fast and operated at scale?

Starship can carry a boring machine. On the Moon or Mars, going underground is the only real protection from radiation, meteorites, and dust storms. Vegas might be the prototype for off-world infrastructure. Maybe not as crazy as it sounds.

[Sun Lee @SunLeeReport]

@SpaceX Raptor 3 is like removing the armor from the engine — because the engine itself has become the armor.

[Sun Lee @SunLeeReport]

Rode the Vegas Loop during my visit. Couldn't stop thinking — what if this is less about traffic and more about proving that tunnel networks can be built fast and operated at scale?

Starship can carry a boring machine. On the Moon or Mars, going underground is the only real protection from radiation, meteorites, and dust storms. Vegas might be the prototype for off-world infrastructure. Maybe not as crazy as it sounds.

[Sun Lee @SunLeeReport]

Seeing both in person made the contrast clearer. The Space Shuttle embodied the dream of reusability. Falcon 9 turned that dream into a working launch system.

One was a vision. The other became an operating model.

[Sun Lee @SunLeeReport]

@jhw19881103 감사합니다.

[Sun Lee @SunLeeReport]

https://t.co/KMt9G1gDp9

[Sun Lee @SunLeeReport]

I saw the Cybercab in person, and one old quote came to mind — Paul Krugman in 1998:

“By 2005 or so, it will become clear that the Internet’s impact on the economy has been no greater than the fax machine’s.”

Smart people often underestimate a platform shift early.

The mistake is rarely missing the object.
It is missing the platform hidden inside it.

[Sun Lee @SunLeeReport]

@elonmusk Add exponential compute, and the joke starts looking like a roadmap.

[Sun Lee @SunLeeReport]

Korea-based here — this is a welcome arrival.
One important local nuance: EV subsidy eligibility alone doesn’t guarantee the benefit in Korea, because local government budgets can run out mid-year.
That makes delivery timing and paperwork speed critical. For Tesla Korea, execution here will shape trust as much as the product itself.

[Sun Lee @SunLeeReport]

Booster catch proved the concept. Ship catch proves the business model.

Falcon 9 reuses the booster — roughly 70% of hardware cost. Starship catching both stages means near-100% hardware recovery.

That's not incremental. That's the difference between a reusable rocket and a reusable transportation system.

[SpaceX @SpaceX]

Ship 39 cryoproof operations complete, the first campaign with a next generation Starship V3.
Across several days, engineers tested the vehicle’s redesigned propellant system and its structural strength, including squeeze tests to mimic the forces of future ship catches

[Sun Lee @SunLeeReport]

Squeeze tests to mimic ship catches — SpaceX is now proving full-stack reusability from both ends.

Booster catch was IFT-5. Ship catch is next.

When both stages return to the tower, turnaround time collapses. That's not a milestone. That's when the economics of space transport fundamentally change.

[Sun Lee @SunLeeReport]

I witnessed this shift firsthand.
In Shanghai in 2016, Volkswagen drew the crowds.
In Shanghai in 2025, NIO drew the crowds.
At IAA Munich 2023, I saw German auto insiders closely studying BYD's EVs.

This is not something you fully understand from headlines alone. Some shifts only become obvious when you see them on the ground. Reality changes on the ground before the narrative catches up.

China is no longer just the world's biggest auto market. It is now setting the terms of competition.

[Sun Lee @SunLeeReport]

@elonmusk From retrofit to native integration.
Less mass, less complexity, less friction.

[Sun Lee @SunLeeReport]

Elon Musk called it “beautifully simple and light.”
Not a new engine. Not a new fuel system. A ring.
SpaceX added a hot-staging ring to Super Heavy in 2023. It worked — but it was a retrofit. By Flight 4, SpaceX was jettisoning it during the booster’s return.
A discarded part is a signal. In a reusable system, anything you throw away means the design still carries a compromise.

Block 3 appears to remove that workaround. SpaceX hasn’t published the mass savings yet. But the design evolution is the evidence:
retrofitted ring → unplanned mass → jettison workaround → more integrated structure

That’s what beautiful means in engineering. Not that something looks clean. That it removes friction from the system it serves.
Not a breakthrough. A system learning to be reliable.