TL;DR: subscribe to topics of interest if the Active Topics section fills up with things that don't interest you.

I disagree with the maemo/meego/sailfish/etc. separation. You can always subscribe to threads/topics if the Active Topics section isn't enough. While this is maemo.org, I'm only here because of meego, and now sailfish _and_ meego, and so are other people. I see it differently: meego existed because of maemo, sailfish/mer/nemo exist because of maemo+meego.

We even have Android/iOS/Symbian discussions in this forum and it isn't bad either.

Finally, it has been expressed that talk.maemo.org wants to be part of the Sailfish community, and so it is for discussions that fit forums, and I'm very happy about that. Look at the great stuff some folks are doing with OLED other halves for Jolla or keyboards or solar panels. Everybody can learn from that.