[taeric]

Yeah, I'm not saying to completely abandon it. However, folks are well served learning that idempotency is your friend. Not always achievable, to be sure. However, even ec2 lets you launch instances with an idempotency key.

So, where I said "seems" to have. Take that more as these "seem to be required guarantees." In practice, they are not required and you need to have plans for them failing, at any rate. Rather than build up a system so that fluke failures are painful, make one that is constantly checking for failures and doing incremental work.

But, above all, my point was to reason about it. Not to take anything as written in stone.