@solene I'm running Ubuntu Touch on my Fairphone 4. It's a little less practical than Android (even with Waydroid), sure, but I find it so much more enjoyable. I'm mostly fine with being able to call, chat, browse the web, and use a terminal, so it works for me. And for banking and public transport I can run those in Waydroid, which I can start and stop pretty quickly to save battery.
Also, having an OS which is not built to get your attention the same way that one built by an advertising company is, is really refreshing and nice.
You get nice deep sleep with notifications with Ubuntu Touch (which I gather is not universal among distros), but it does sometimes feel a bit limited by the fact that it depends on working around some Android-blobs via Halium for my specific device, for example, wired USB-C headphones are a little wonky at the moment, but I can listen to music/podcasts with them with a simple pulseaudio tweak.