Calyx Os supports the FP4 and announced support for the FP5
That just to be said.
I have e os on FP4 and I would describe my experience as follows: Do you want to switch from IOS to Android without loosing the style of the launcher and gain some privacy? Go for it
If you want an Android that does a lot for you and give you tools like a vpn, a tracker blocker ect… Go for it
If you want to customize your experience (e.g. have an “normal” Android launcher, switch accent colors …) ? You get a very rocky experience to say the best.
And at least for the FP4, some stock apps like the Cam were just not working, but to be fair it seemed like that was a suppychain problem…
I consider changing to calyx Os, expecting to get a more customizable Android.