I'm bummed about the ARM move. I think it's mostly a result of I'm not Apple's target market anymore. They want casual users who only care about iMessage and web browsing with some light app usage. Business users can run O365 and spreadsheets fine if they need to. Creatives can use Adobe CC. I'm a fan of the usability of MacOS, but am a power user. There are times when I like to get into the shell and do stuff, and while I use it for work, I like to play games on it too, and Apple has always had a hostile attitude towards gaming on their laptops. They're happy for you to buy their casual iOS games, but I want to play RTS, MOBAs, FPS, other stuff...and while you can find options on Mac, it's really limited. So you're stuck with the choice of maintaining 2 systems, a windows box for gaming and Mac for everything else. It sucks because they supposedly built Metal as the OpenGL replacement to make gaming and coding for their system easier, but it hasn't taken off. I think from their Exec team down, they look down their nose at that use case - even though the hardware is more than enough to support it.
Now with the move to ARM there will be even less incentive for any AAA game developer to make a MacOS version. I guess I need to bite the bullet and get a Win10 system.