There is something massive missing from Linux that for me has made it even less likely that I would use it full-time (I've tinkered with it in my youth): personal data. I have so much personal, important data generated regularly thanks to smartphones. Photos, videos, voice memos, notes, computer files I want to access anywhere, health data etc. etc. iOS/Mac has made this seamless, secure, and in 15-20 years it has not gone wrong for me. Sure there are horror stories posted from time to time but for 99.9% of people it works really well almost all of the time. Replicating this with Linux systems is difficult, requires lots of setup and maintenance, and incurs significant risk for me in terms of data loss.