Now they'll probably get someone on discount, because our salaries are going to tank due to evaporating demand, but I sincerely doubt it'll be zero-d demand.
What I expect is a 3D printer moment - tons and tons of homebrew / shareware style software coming out, an explosion of boutique code.
I also expect a CNC machine moment - vastly reduced demand for hands-on specialists, and more babysitting of automted processes. But it's those machinists who got those jobs.
We could be looking at a long term suppression (~80% reduction?) in demand though until economic growth produces enough demand to employ ~50M software engineers again, if ever. The cliff is unlikely, I'd guess the unregretted loss will be replaced by AI productivity every year, and some portion of growth will, too.
I also guess that all the AI companies can become massively successful without causing much unemployment just by following Claude's model - charge a certain tangible % of a salary for assisting the worker. https://jodavaho.io/posts/ai-jobpocolypse.html