I kind of prefer to fedora.im.
- It seems less formal, which may be a good thing if people are going to use it for informal not-Fedora related things where
fedoraproject.orgmight feel awkward. I think this is more important due to Matrix clients mostly not supporting multiple accounts. - It’s shorter. It probably has no effect on Matrix itself, but it may mean (a bit less) traffic to bridged protocols like IRC where the username is generally shown in real name (gecos) and it can be cut with particularly long account names. The real name may matter in case of channel access or bans which in case of freenode has extban
$rfor bans and quiets (I thought also invites, but the/quote help extbanintegrated documentation of freenode disagrees. - Anyone using it can add
#whatever:domain.tldaliases for rooms and any room moderator can publish those. That may result into nasty addresses involving Fedora Project circulating around. I originally had some other reason here, but it slipped my mind and I was only able to think this in addition to the two above ones.
I also saw a question on Fedora Diversity brought up on whether Matrix accounts will be renameable once FAS/Noggin supports that, but that may be a topic for different thread.