LLMs are faster until the technical debt comes due, at which point all supposed productivity gains evaporate and you're now 10x slower than doing anything by hand. They have a use if the debt never comes due, eg. for one-off scripts or for prototypes you will responsibly dispose of. The debt does come due in production, very quickly.

LLMs write code that compiles, which they accomplish mostly by robotically attempting the task and repeatedly fixing compile errors in a loop. That's a very narrow definition of "code that works", and I would argue it is the starting point, not the finish line. My definition of code that works is more like: secure, stable, maintainable, efficient, performant, effectively bug-free, with an ergonomic interface. LLMs fail on every single fucking count. I routinely observe generated code that leaves trivial 10x or 100x gains on the table, while having severe deficiencies in every measurable approach.

Given that you talk about assembly as a bogeyman, though, I gather that you're from the generation of "software engineer" who was already writing insecure, unstable, unmaintainable, 100x inefficient, 100x non-performant, bug-ridden JS for everything. LLMs can replace this class of people, it's true.