You could say that about programming languages, but they are so useful there end up being a lot of variants.<p>I searched for a shared memory key value store high and low for interprocess communication and the closest thing I found was WhiteDB.  WhiteDB is pretty great, but its concurrency is done through locking and it is very unfortunately GPL licensed, which makes it very niche. (BTW a shared memory key value store for IPC is AMAZING).<p>There are a ton of key value stores out there though amazingly enough I&#x27;m still excited when I see announcements because I haven&#x27;t found one that is what I want.