Missed my favourite one: differences in the memory consistency model. If you’re using stdatomic and the like correctly, then the library and compiler writers h

Missed my favourite one: differences in the memory consistency model. If you’re using stdatomic and the like correctly, then the library and compiler writers have your back, but if you aren’t (e.g. using relaxed ordering when acquire/release is required), or if you’re rolling your own synchronisation primitives (don’t do this unless you know what you’re doing!), then you’re going to have a bad day.