They're fast, stable, and if you can live without camera, cellular and fast charging, (which yes, I realize means it's more like a tiny tablet than a phone) everything works beautifully.
EDIT: Cellular Data works, just not phone calls, so if you have a low latency/reliable 4G connection you could make VoIP work probably :)
This OS on a phone is "close to daily driver" and yet phone calls don't work.
I mean this not as a slight, I'm a huge fan of Linux on mobile devices, using them since Maemo, Moblin, webOS, SailfishOS, Jolla, and now postmarket and Pine.
People here definitely tend not to be average, myself included. However, I think for the "average" HN user, it's at the point where you could make it work if you wanted to.
For the global average user, it's not "technically" far off, just practically since most apps are only for iOS and Android, so even with perfect hardware support the OP6/6T or really any mainline kernel linux device wouldn't be a good fit.