Its doable I guess but you will have to check and see if the stuff you need works well enough. If you can compromise, you will likely get it working. Bonus points if you can donate or contribute. I contribute. My OP6 works very well but I‘m still transitioning.
I don't use it. OnePlus 6s are as rare as Apple IIs here lol. I would love to try though. From what I know it has some issues that depend on the DE you choose. There aren't many apps and unfortunately landscape mode didn't seem to be implemented the last time I checked so using unoptimized apps is not easy. But also reviewers say that it's smooth and even battery life is decent (at least on GNOME Mobile) so it's going quite well for the OS I think. You probably can use it as daily driver if you only need a terminal, a browser and basic productivity apps (clock, calendar and notes) but it's constantly updating so new bugs may appear all the time
No, that mobile OS is not ready, and probably won't ever be. I have it installed on an OnePlusOne, it's just alpha. Postmarket OS is much better and further along, but still not good for day to day usage. I eventually ended up on Murena e/OS, which is based on a more private, totally de-googled version of LineageOS (which is Android).
As already mentioned, postmarketOS is probably closest to what you want for an open source android replacement, though it’s still not 100% there if you’re looking for a perfect alternative.
Personally I’m going to try it out as a daily driver when I can get a cheap pixel 8 when the 9 comes out later this year
And it works insanely good on the OnePlus6. I‘m working on that rn. If you want „perfect“ without spending money (donating) or contributing, I suggest proprietary stuff though. Not because I believe its good. I just want to show people that „perfect“ is not a healthy demand.
I just randomly found a OnePlus with a community build of PostmarketOS (Alpine).
I would not use something based off Ubuntu, but the general Linux Desktop is either insecure (traditional apps) or too resource intensive for phones (flatpak).
Also the boot process is way less secure than on a Pixel with the separated Secure Element and all the verification mechanisms.
In general Android uses hardware encryption, profiles are seperately encrypted, and it uses an equivalent to the TPM for that. Many Linux distros are just catching up on that.
Updates can be equally stable and in the background when using rpm-ostree.
Idle battery life is worse. My old GrapheneOS phone that I use as an mp3 player lasts for 2 weeks.
Tons of Apps rely on Android libraries and Waydroid is very outdated currently. If they update to Android 14 and if you use a base OS with SELinux, the Android security model is intact. (The Android sandbox relies entirely on SELinux, without SELinux Apps can break your phone or invade it).
On Android you have the work profile, which allows you to run a set of isolated apps next to the others, apart from the normal App sandbox.
Android is pretty great and GrapheneOS is the best variant of it, if your priorities are
Stability (reliability, not some weird Debian stuff)
Fast updates, often faster than Googles or slightly behind (as they are no Google certified OS they dont get early access, UNLIKE Fairphone which still manages to not ship updates for months)
I did that exact thing and it is basically unusable. And that was before all network connectivity broke leaving it actually unusable. I also haven't been able to flash the normal rom back so it's basically a brick now.
It's like two guys. Working on downstream of all things.
Find me a public code repository, a social , or some other cohesive piece of confirmation this is still in development recently, and I'll delete my comment.