I thought it was the Lisp Franz and wondered what I missed as that's much, much older.

Anyway; I gave this a try (on Mac) and was not impressed; coming in at 1.44GB, immediately very slow and my battery almost immediately flagging it as the app using the most energy, I went through the setup; after the setup was done I was left with a blue empty screen and nothing to click on. So I killed it and started again; that opened my workspace without any messengers added (I added 3 during setup). So I added whatsapp and that resulted in a half screen whatsapp on top of that darkblue again with no options other then to kill the app. After restart, whatsapp was there and working, albeit very slow (franz still consuming most energy); whatsapp is notably slower inside Franz than the separate one (they are both electron I think?).

Not Franz their fault, but I added Slack and literally spent 15 minutes solving Recaptcha's of buses over 50 of them, before it let me in... Wtf. I think Slack sucks at the best of times but this was very terrible.

Anyway; Not for me, but nice work sticking it out 10 years!

It's electron, everything electron will always have these performance issues unfortunately

Btw actual solution for you might be plain old Pidgin

Exactly. I was tricked too.