I worked 16 hours a day for the past 6 months on 1 single project, with 6-9 concurrent sessions as regular/daily routines, I can say that the bottleneck is human judgment. AI can help to speed up the progress, shrinking weeks of dev works into hours, but it is human's job to take the wheel and pave the way to achieving the objectives. I think we are at a golden age: theories can be validated faster, ideas can be realized sooner, and cheaper.