Now is probably the best time to learn @nextjs.
In fact, I'm actually envious of folks who are just picking up Next.js – or even webdev in general.
You're diving straight into a more efficient/intuitive way of programming, without having to "unlearn" any existing mental models.
GPT4 was a feat of engineering by a great team
Here is the (all highly skilled) team breakdown:
1. Pretraining: 83
2. Long context: 12
3. Vision: 57
4. RL & alignment: 128
5. Evaluation & analysis: 147
6. Deployment: 86
343 unique folk in total (some did more than one area)