Preferring sourceforge over github seems like an unusual choice, I didn't realise anyone still used it. It's a git repo too, I wonder why they did that?
Just to name a few. As a project admin of fceultra I cannot say that I'm 100% pleased with the UI of the bugtracker and the sf does have its quirks, but sourceforge has had a much better track record than github in respect to uptime. My question to you is "Why not?"
Tbh, I was speaking from a position of ignorance. The last time I used sourceforge properly must have been circa 2006/7 and it was an abomination then - clearly that is not the case now.
It definitely felt cleaner from a UI perspective today (albeit not github-clean) and the sluggish document load times that I remember were also not in evidence.
The open-source ecosystem is definitely richer for every hosting solution that exists, sf included, so if my comment seemed sneery I apologise. It just surprised me at the time is all.