why not? (haven't seen any myself, tbh)
I've had a blast playing Smokin' Guns : https://www.smokin-guns.org/downloads
(Veloren is pretty awesome too, in a completely different way : https://veloren.net/ )
End users (so to speak) usally don't buy full parmesan wheels, anyway ;)
What do you mean by specifications?
This was a few years back, and my memory isn't that great, but from I recall : Diaspora had a rather privileged childhood, in the form of a very successul kickstarter. And they basically were the cool kids back then, and as such they didn't follow any existing protocol (which, at that time, would have been either OStatus or XMPP, basically) and went their own way. Federation at that time wasn't that much of a hype, but still they (rightfully) felt it would be great to document their protocol, and they published (some sort of) specification.
At the same time, Friendica's author (which then went to built several other socialnetworking tools/platforms, as RedMatrix, Huzbilla, Zap, Zot, ...) spent some time trying to federate his tools (can't remember if it was Friendica or RedMatrix) with Diaspora. And was appalled by how unusable the specification was. From what I understood, at least.
It's been there much longer, for one thing. But from what I recall, it's been a mess specs-wise. I do especially remember Friendica/Zot's author despairing over how little they followed their own specifications. I'm not sure they're still relevant today
It's still alive (on alternative repos), but it still has glaring issues : as decentralized as it wants to be, it still relies on centralized services (or "zites", 0net's own lingo) to manage authentication, for instance.
For something that isn't too obvious (e.g. not hanged in a museum or anything), I often come back to that picture and it always move me, for some reason :
There are actually people (e.g. https://www.twitch.tv/andrewmccalip) who are currently trying to replicate this. But from what early (internet) experts said, even if it works, is replicable and legit, it wouldn't allow much current through it, about a quarter of amp. Still promising, but not as groundbreaking as initially put.
I once did that, after unexpectedly stumbling upon an old college friend of mine. We had a nice lunch, planned to have another one but didn't really scheduled it. Life did its trick, and we lost touch again.
Not sure if it checks all your boxes, but you could have a look at the following (and tell us if they did) :
Hot water, directly from the tap. Showers are clearly underrated.
For what it's worth, that same github user already reverse-engineered the game : https://github.com/skynettx/raptor and this one should be able to compile on modern platforms.
There is probably a story behind the source release, I wonder what it is...