When Apple announced that it was going to transition to PowerPC, I was nervous. I didn’t like it. And yet, when it happened, nearly all of my old software ran perfectly - and that which didn’t hadn’t worked properly since the move away from System 6 anyway, so it wasn’t the new CPU at fault.
When Apple ditched Nubus for PCI I was similarly concerned. Why? I have no idea. It’s not as if my Mac was stuffed full of Nubus anyway. But Nubus was a familiar old friend - and PCI came from that other place.
The move to OS X didn’t worry me too much. I’d been using A/UX. From my perspective, it was just the resurrection of a great OS which had been dead for a few years - not that OS X, being derived from NeXT, had any A/UX in it anyway - but the concepts are remarkably similar.
The move to Intel only worried me insofar as I thought that developers might concentrate on Windows only, and just wrap their software in a translation layer to support MacOS, resulting in a diminishing in quality. This happened with games, and not much else. As for buying a Mac just to run Windows - I still think that that’s barking mad. There’s some very nice Wintel hardware out there - you don’t need to buy Apple to get great hardware - you just need to be prepared to pay a hefty chunk of money (which you were going to do anyway if you buy Apple).
From what I’ve seen, the new Macs will run macOS software just fine - and that includes virtualisation and emulation software (so you can still have Windows if you really must). Docker is present, correct, and fully supported by Apple. You can have Linux too (although, and much as I like Linux - it’s on all my servers, and also on my media centre, why would you want to? MacOS gives you Unix and a nice GUI so, there at least, Linux isn’t necessary.)
My only concern now is that Apple might prevent users from installing software from whatever source they choose. As long as macOS hasn’t been locked down in this manner I think that all is still well.
It’s human to fear change. The intelligent thing to do is to put those fears behind you, make a rational judgement on whether the change is beneficial or not - and then embrace it if it is. In an age of climate change, anything that provides more CPU power per watt has to be a good thing. Intel has been as relevant as PPC for a little while now - I’m only surprised that this didn’t happen sooner.