Well, stackoverflow required competent users to participate. There's no need for that any longer. The "gap" will probably be addressed by LLM-designed tools that are only usable via LLMs and bigtech will be more than happy to put their own LLM-designed tools at work for their products, which means there'll be vendor lock at scale, so in the vein of the "digital realm emulating the analog realm" there'll be companies you'd have to specifically train for and none of it would carry over...

but this is assuming this current level of progress stagnates for at least the next five years. Sigh...