All the disadvantages of those stacks still exist.

So if you need to avoid GC issues, or have robust type safety, or whatever it is, to gain an edge in a certain industry or scenario, you can't just switch to the vibe tool of choice without (best case) giving up $$$ to pay to make up for the inefficiency or (worst case) having more failures that your customers won't tolerate.

But this means the gap between the "hard" work and the "easy" work may become larger - compensation included. Probably most notably in FAANG companies where people are brought in expected to be able to do "hard" work and then frequently given relatively-easy CRUD work in low-ROI ancillary projects but with higher $$$$ than that work would give anywhere else.

And the places currently happy to hire disaffected ex-FAANG engineers who realized they were being wasted on polishing widgets may start having more hiring difficulty as the pipeline dries up. Like trying to hire for assembly or COBOL today.