CIRCLE WITH A DOT

@thedarktangent re: E2EE, I will say that I've had unrecoverable OMEMO issues on XMPP where we had to disable encryption completely, so if you need encryption, XMPP is not great either.

@thedarktangent Depends on what purpose you have in mind.
I've used Matrix the most so I'll try to comment on what it's fit/unfit for.
E2EE: sometimes it breaks, hence the infamous "unable to decrypt message" meme
system load: Synapse is known to use lots of resources, you definitely can't just leave it unattended for months, it will fill up disk space. Other implementations are lighter but support fewer features. Less of a problem if you disable federation.
clients: Element is pretty heavy, the others lag behind in featured / bug fixes. Even Nheko isn't exactly lightweight.
voice/video chat: Native calls actually work pretty smoothly now, but I haven't tried screen sharing or group calls.
moderation: Moderation tools are lacking. Permission system is also not very fine grained and AFAIK uses "power levels" instead of ACLs.
notifications: Still doesn't have a "mentions" list, or maybe it does but it's in beta. If you have a busy "inbox", you will get lost.

I see others recommending it as the default Discord alternative and I think that should be taken with a heap of salt. It's certainly viable for some niches, but expect some flaws.

@EUCommission @HennaVirkkunen