Maybe, but that might fall into the bucket of "doing things that would have gone undone". AI slop often doesn't displace designers because it is used in places

Maybe, but that might fall into the bucket of "doing things that would have gone undone". AI slop often doesn't displace designers because it is used in places you would never buy a design for. If the react feature wouldn't be done without AI... It just wouldn't be done and the business would probably survive. Every software project has an infinite list of feature requests, bug fixes, etc. The cost of doing the work can shift a lot before it makes sense to start firing people. If there were actually a 100x productivity improvement it might be noticeable, the realistic estimate is closer to 20-30%, maybe 50 if you're writing very simple React exclusively. I think staffing levels is driven more by business/HR constraints than some ticket/worker calculation.