Have you seen the latest review of the Librem 5 from Linus Tech Tips? The phone seems to run Linux apps fine... it doesn’t have working camera drivers a year after release though...
Hell, I still don't have my damn order and I placed it in Oct. 2017. Their last post said early orders would be completed by EOY, but my last email to support they said another two months.
I want to be supportive but holy hell am I frustrated.
https://youtu.be/BH8DRyKUZDg
So Pidgin (gaim for those of us old enough to remember those days) should run fine without a port.