I think it's more like steamshovels. 6 months ago they were enabling people who had never broken real earth to find out why osha has so many rules about shoring up walls. You could pull off something complex or delicate but it took a procedure with too many steps too much time to get there, good outcomes were pleasant surprises and required careful target selection. Now it's more like paying good money for a professional. They show up, measure twice, cut once, you're walking around your shiny new hole wondering what took the last guy so long.
The frayed edges on what I have slopped together as unreasonably ambitious, ludicrous projects with fucktons of tokens from models 6-9 months ago mostly look like situations where a capable-enough-to-be-dangerous developer tries to muscle through problems that explode in width & depth but keep digging (so, a tier below stopping early to do more design, two below recognizing the need for more planning from the outset). The primitives are there, most major things work well enough, but the remaining functionality and performance is inaccessible. At a cost of multiples of >1/8th of a $200/mo subscription.
Right now I can put $10 into DSv4 Pro/Flash or Qwen 3.8 Max/Flash, hand it a project and all of its unfinished forks in a state I barely remember, tell it that I want the things these forks have been working towards, and 8 hours later it has ie an working, tested, benchmarked multicore car physics simulation fabric with all of the forks evaluated, the gains merged in, the remaining work documented. It only needed a few hundred more lines of code but Codex 5.5 was never going to see that.
9 months ago I was saying developers are not being ambitious enough with these things, that's only more true now. They lend themselves to digging far deeper than they should: 200kloc god files, dozens of forks. Let it happen, you don't need to read it, it's for them, later. The only time you make them clean up is when it has a severe adverse effect on how long builds/lints/tests/benchmarks take. Spend a whole week having it do nothing but dig up published papers in relevant fields with cutting edge techniques and translating them into feature specs. Pick whatever state of the art is and try to crush it, throw everything at it, leave it looping on vague but wildly ambitious goals. When it modularizes and refactors it all down you might 'do a breakthrough', or maybe it happens in an hour over christmas break when you're trying the next one.