>That 4x more features are developed. That 4x more projects are sold to clients/users.
The absolute best outcome of LLMs, and frankly where it seems to be headed, is the death of bloated one-stop-shop-for-everyone software. Instead people will be able to use their computers more directly than ever, without having to use/figure out complicated unintuitive swiss army knife software to solve their problems.
LLMs today can already make people the exact tools they need with no extra feature bloat or useless expansive packages. An print shop who just resizes their photos and does some minor adjustments not available from free tier software is no longer a slave to paying adobe $40/mo to use <1% of Photoshop's capabilities. They now can have their own tailor made in-house program for free.
LLM's will not be slotted in to replace devs on adobes dev teams. They can't work on a photoshop size codebase. However they will likely cut demand for Photoshop. Very few people will mourn the death of having to pay monthly for software just because there is a language barrier between them and their computer.