I'm not pro-LLM but this already happens all the time at corporate levels when the bean counters decide to fire (usually constructively dismiss) their senior talent. They have a complex codebase that captures domain specific logic well and uses good practices but then they try to have a dev team that's half the size and 1/10th as experienced try and fail to maintain it. Then customers complain and it gets poorly patched over and over again until something important breaks and they have to stop touching entire parts of the stack or they leak a db dump or get ransomed or the site goes from 99.9999% uptime to 90%.

I do understand that at an industry level you're describing something like the memes where only millennials can edit a pdf because the boomers/gen x never tried to learn tech and the zoomers were never exposed to non-mobile-app workflows as kids. Where the skill itself is mostly generationally bound. But I do think the skillet will remain, just not at the corporate shovelware factories where it was already actively despised as a cost center to be done away with at the earliest opportunity. Because they already deskill there! And outsource with zero investigation of competency (not a dig at workers getting the outsourced jobs, even the ones that don't know their stuff, because hell yeah I salute that).