> Vendors aren't doing the hard work for anything but Android.

Because of Google's cartel-like structure where OEMs get more profit by joining, Google shares some revenue from screwing the user.

> postmarketOS and other projects are working tirelessly at bringing Linux to phones.

postmarketOS has ZERO partnerships with any OEM, their device support is "as is" and done by volunteers, not by vendors like Qualcomm or Mediatek.

> SailfishOS

This one is interesting, but currently the "Jolla Phone" can't be bought "right now", you can order for October..

I see some hope in Murena too, they partnered with Fairphone / Gigaset, so the device support is real there, but it's still Android..