Does it support group messaging? I don’t see that mentioned. That was the deal breaker for me when I used Firefox OS, Ubuntu Touch, and Sailfish OS in the past. I loved them all! But they all had a dealbreaker or two.
Assuming you mean group SMS: I suspect not, since it seems to be using mostly the same stack as the Librem 5, and that doesn't seem to yet. (This is my dealbreaker too; I have a PinePhone sitting next to me running Ubuntu Touch, but I won't be able to use it as my daily driver until that works.)
Group SMS == MMS. This is the one thing that is stopping me from switching as well. There is someone who has gotten experiental support, but it sounded like there is still some work left to get it to work.