I have a Fairphone 6 with /e/os and it was great until I found out it has no RCS support, and every time someone with real Android or iOS sends a group text you get nothing and they don’t know you didn’t get it. For it to be workable you have to go around begging your friend to turn off RCS on their end and good luck with that.

If you turn off RCS a day or two before switching and ensure you message these groups after this is typically negated (at least in my experience) GrapheneOS just put out a way to use RCS on its OS this month which is really nice, I have it on its own profile for RCS and use open bubbles for iMessage/FaceTime and I’m astounded how well it works tbh. But the goal is to slowly harass enough of my frequent contacts to get on signal, so far I’m doing great, my largest hold out being my wife lol

GrapheneOS technically on paper supports RCS but I cant get it working and afaik most people can’t get it working either (I think its more RCS works on GOS for some people with very specific carriers)