Mastodon feels a lot like the 90s Internet, and not just for lack of the cute/clever/less texty features added later. It’s also still significantly influenced by the ethos of people who care intensely about the whole thing as an experience—and as a meaningful project that they’re helping to build.
I’d say subjectively the 90s Internet died on 9/11, which coincided with an influx of people who took it all for granted and just showed up to fight. It can’t take that long to happen here, can it?