I mentioned M1 and specifically excluded it since it is unreleased. Is that fully released such that I can buy it right now? Apple site says 17th Nov. Can't kno

I mentioned M1 and specifically excluded it since it is unreleased. Is that fully released such that I can buy it right now? Apple site says 17th Nov. Can't know if it breaks things until it is released. I also said 'architecture change' so by your count that would be 2. But Rosetta was only for PowerPC to x86 wasn't it? There seems to have been emulation for the 68x chips but was it seamless without breaking anything? I mean any company could change architecture but rely on a customer using an emulator that isn't really not breaking things. So by my count, 1, but if I am wrong and the 68x translation was equally as seamless and breakless than 2. But to say it was unheard of you need to reference all the other companies that transitioned architecture and broke stuff. I can't think of another general computing supplier who did that but I might be wrong - can you give an example?