> I think the same is currently happening with coding, except it will allow single builders and designers to do the same thing as an entire team 5 years ago.

This part of your post I think signals that you are either very new or haven't been paying attention; single developers were outperforming entire teams on the regular long before LLMs were a thing in software development, and they still are. This isn't because they're geniuses, but rather because you don't get any meaningful speedup out of adding team members.

I've always personally thought there is a sweet spot at about 3 programmers where you still might see development velocity increase, but that's probably wrong and I just prefer it to not feel too lonely.

In any case teams are not there to speed anything up, and anyone who thinks they are is a moron. Many, many people in management are morons.

For certain kinds of software (financial systems, safety-critical systems) it may be very unwise to go beyond level 5.

There may be certain fields where you can't even get to 5.