[lemming]

The thing is that implementing ACID is, well, atomic - you either support it or you don't. Anything else is one of a series of different types of compromise. All currently available NoSQL systems I'm aware of compromise it very heavily, resulting in greatly increased programmer complexity for the types of applications that really require something that looks like ACID. I'd be interested to know which ones you think support ACID - as far as I'm aware none of them claim to support anything like it (with the possible exception of VoltDB, which has its own set of problems).

[jbellis]

Scalaris has supported ACID transactions for years, but it never caught on because at scale you care more about availability than about having transactions: http://twitter.com/Werner/status/1008722501

[jhugg]

If you're counting important things (money, inventory, etc), being up with the wrong answer can be worse than not being up.