Devs just use new tech as an excuse for bad optimization...
Naw, I reject simple notions of "lazy developers" being to blame for all the ills of game production.
Myself, I know from research and talk, from relationships of a few industy workers, from even a tiny bit of experience, that there's way, way, way, way, way more to any aspect of these types of discussions. Sure, developers cut a corner and/or push their luck at times yet then get by with a "Phew, it worked..." relief, but on an industry level (and with as much independent, experimental work is being done out there, albeit much of it in established engines or toolsets which can reinforce the bounding box,) there are people out there looking for the next way through.
.... so in the end we end up gaining almost nothing from the new tech being used.
It's for sure disappointing, whether it be a mystery or an outrage why.
This advancement of IO specifically, there was such a clear case for what it would solve and offer (going back to the Cerny chats or the MS DS demo.) I honestly expected to see some sparks of innovation come from the transition.
There are unfortunately reasons why the results haven't been revolutionary: there wasn't a similar jump in storage space, there's been consolidation of middleware technology, procedural generation has become the hotter and possibly more promising concept, the money has steered a certain way, the bounds are potentially too big for small experimental offices to explore, the publishing industry is not interested in risks, etc. None of those reasons closes the book on breakthrough play coming from breakthrough IO, but as a key aspect of the generational upgrade, it didn't offer the expected heights in its generational jump.
I'm still holding out hope that some developers out there are still pushing towards realizing the promises that this tech came with when it was first announced, and I'm crossing my fingers that when a developer does come up with a path forward, there's a publisher confident enough to back them for pushing into that void.