I've been forced into graphene due to calyx' abandonment (and piss poor communication -- "oh we didn't realize people don't regularly check our website in case the entire organization collapses overnight") of it's users this year, sadly. There just isn't an alternative afaik.

On the graphene front I've personally been banned from their matrix chat on several accounts, none of which I actually used to post in their chat -- they did a blanket ban of anyone in the calyxos channel. Not posted there, not posted in graphene, not having actually done anything, they blanket banned (he now denies this ever happened). Which honestly given how many times I went on to see him uncontrollably ranting at people was probably for the best. He and his most ardent supporters are a brigade of trolls.