Will this means many will be jobless? No, they would do other things. They'd be using this software to support society, operating at a high level. Think low-code, but incredibly complex stuff; just not raw code anymore. Instead of making circuit boards out of descrete components, you now slap a few ICs on a board with some supporting passives and the work is then all done in software. Engineers use more high-level components rather then welding and machinijng things from scratch; you buy T-slot profiles and bolts rather than casting and milling steel from billets.
So the job of programmer may disappear simmilar to how we don't have bakers anymore, baking is done in factories, operated by a small staff. Current-day programmers will then increasingly shift to whatever high-level constructs we'll come up with, this high level work will be supported by the base infrastructure that those who still touch raw code will build.
Expect anthropic to want to capture more of the supply chain over time
I find that scalability is usually overblown because computers are fast now, which is not to say you shouldn't make it run fast on one computer.