A simple and fundamental bit: downgrading the OS is a PITA (is it even still possible ?), and dealing with the T2 side of it makes it a million times more complicated.
On more pet peeves level of hostility:
Still haven't found a clean way to get rid of Apple Music. Every single time I accidentally click the play button on my headphones it brings up Apple Music.
2FA verification being bound to Apple devices.
Phasing out kext support under the security reasoning also means decent low level extensions are now a dream of the past. Stuff like Karabiner are notably worse when system perfs degrade, and I'm not holding my breath for linux partition mounting.
On more pet peeves level of hostility:
Still haven't found a clean way to get rid of Apple Music. Every single time I accidentally click the play button on my headphones it brings up Apple Music.
2FA verification being bound to Apple devices.
Phasing out kext support under the security reasoning also means decent low level extensions are now a dream of the past. Stuff like Karabiner are notably worse when system perfs degrade, and I'm not holding my breath for linux partition mounting.