New chains keep launching for a reason. Each one makes a different trade-off.
Some optimize for speed. Some for low cost. Some for privacy. Some attract a particular kind of developer and build their whole culture around them.
Think of a hospital. Cardiology. Radiology. Pediatrics. Nobody suggests merging them into one giant department to make things simpler. The specialists are the whole point.
What makes a good hospital work is the shared patient record. Every department reads from the same file, so nobody has to re-explain your history at every door.
Crypto has the specialists. What it's missing is the shared record.
That's how I read @WireNetwork's approach. Leave each chain good at what it's good at. Coordinate ownership on one layer across supported chains, so moving between them doesn't mean starting from scratch.