I doubt they'd do anything to break Macs for developers because that's one of the big market segments for Macs. It'd be like removing emojis from the iPhone. :)
Apple has demonstrated for years now that they're not interested in the enthusiast/power user/developer market. They want the profits that come from disposable mass market devices. The switch to ARM laptops would be the perfect time to switch all of their laptops over to iPadOS.
Right, that's why they released the 6000$ Mac Pro. I'm sure iPad OS will run nicely on that.
Do you find that people respond positively to sarcasm?