SpacetimeDB fits into a genre of tech that I want to call "universe brain reorgs" - structural re-arrangements that might unlock wild performance increases. The challenge with these is that they require devs to re-align their thinking and it's hard to disentangle if "the problem" is that the technology isn't being fully embraced or if the promises of the tech don't work for your use case. Other techs in this category…
That's not a judgment on SpacetimeDB, but it is kinda how it plays out with these kinds of things.