Mostly multi-factor authentication for my day job, because I work for a bunch of cunts who won't spring for a company phone for company apps. The only reason I even have an iPhone is that my mobile provider was giving 'em away for free while forcing people to upgrade to 5G devices.
And if I ever get to retire, first thing I'm doing is getting rid of my phone and home internet connection. If I need internet I'll use a VPN over free wifi at the public library.