My condensed point is that it would be both a lot more clear to users and a more powerful middle finger to Apple if projects just dropped support for macOS.

Apple isn’t feeling the heat for the dumb decisions they make with their platform, users are because they get berated as idiots for ever owning an Apple device by frustrated maintainers.

I mean I’ve seen things like “the problem is not the $99 developer fee, it’s paying it to Apple”. If that’s how you feel then my offer to cover the fee so your project can publish notarized releases isn't going to go anywhere and your project wont ever properly support macOS. Sorry.