Here are some rooms you can join from the QOTO matrix server that have 100 or more users in it that I particularly enjoy:
#freenode_##agi:matrix.org
##cs:matrix.org
#physics:matrix.org
#Syncleus_aparapi:gitter.im
#Europe:matrix.org
#Nederland:matrix.org
#Occultism:matrix.org
Not sure what this is in reference to. But if they need a server to host a room they are welcome to use QOTOs.
Freenode is pointing irc.libera.net to chat.freenode.net - https://fedi.absturztau.be/notice/A99J6EIbR2QWmhpe1A
LOL I did know about the freenode exodus.. didnt know about the libera redirect though.
Seems some of the freenode chat rooms did move to matrix though which im happy about.
I had a nick whose created date was close to the creation of freednode itself. Once they wiped my nick there (I was very pissed) I had no reason to go back.
@freemo @QOTO @GNUxeava
Yeah I don't plan to go back to #freenode . Here's some interesting statistic thanks to @fribbledom
🎓 Doc Freemo 
🇳🇱
LucifarGundam
Emi Yusa