Are you serious? This is Apple, the same company that purposefully made their messaging service less compatible so that children would get bullied into buying their products. You really think they would allow anything that isn't MacOS to be run on their hardware?

Apple has never locked down the bootloader on a Mac-series product before.

(But they have never not locked down a product with an A-series CPU - hence my concern)

They do allow you to run third party operating systems on Macs. For now.

Yes? This is a demonstrable fact?

Lay off the hater-ade for a second.

Uhh... you know when the Mac's were Intel they specifically made a tool for installing Windows on your Mac and shipped drivers for Windows.

Because they were basically OEM'd PCs with an Apple logo at one point, and used it as a selling point, but I don't think it was a particularly popular feature among the general userbase. I've personally seen more Hackintosh laptops than Macs running Windows.