I'm rocking CalyxOS on my Fairphone4. The installation was smooth as a baby's bottom and I've never had any issue with it, save for a small bug with the backlight control under intense heat in the summer that took a while to fix 2 years ago.
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LineageOS on FP4. Did not encounter any model-specific issues.
Usong iodéOS, everything went smoothly, no issues so far. At the time I received the FP5, lineage didn't have aa build publicly available, and therefore neither did microG, so I went there. Didn't see a reason to move out yet
I have a fairphone 5.
I tried installing iodeOS, the installation was quite difficult as their tool let me down during the installation. Impossible to complete the installation, after multiple tries. So I had to install lineage OS and sideload iode OS on top.
Then I tried CalyxOS, the installation was seamless. I added TrackerControl to limit the tracking of some apps from the aurora store and a Gcam port. This combination is the best phone experience I'ver ever had !
I had a Galaxy S9 with /e/OS, and it ran pretty smoothly. No issues with banking apps, or other common sticking points. Just no NFC
I now use a OnePlus 11 with LineageOS, and have run into issues with Spotify (of all things) and occasional issues with Aurora store on the work profile