Still doesn't matter much. How many times have you actually cared about atomics, even ignoring that the most common case by miles is 0 contention - for producti

Still doesn't matter much. How many times have you actually cared about atomics, even ignoring that the most common case by miles is 0 contention - for productivity you just get it right once and reuse the code. Especially for the time, most code has been and is painfully single threaded, only really relenting quite recently. Having an extremely strong memory model is also potentially a performance issue because the CPU is much more expensive for the same performance.