It's so strange. I'm an android user myself but majority of my dev friends are iPhone users. I can't see them switching because they of Apple ecosystem - mainly iMessage. So I'm really curious what's driving people from OSX to Linux
The main reasons were mainly getting tired/frustrated at how hostile Apple has been to developers and users. Apple has been slowly turning macOS into iOS, from the UI to slowly trying to lock down the OS. There is also the Apple upgrade treadmill where they force you to upgrade your hardware through planned obsolescence.