Bear in mind that N900 has an outdated h/w and no official support, actually the only reason why we still use it, is this community. Similar things apply to N9, unfortunately, and no updates either.

Sailfish is not that mature yet as N900 or N9. Jolla is not as big as Nokia and I think they need our support to make this platform as good as Maemo/Meego.

the s/w apps you mention can be ported to sailfish, however there is a significant difference, N900, and N9 used native drivers for h/w, while Jolla does not, this makes it more difficult to port some apps, e.g. wifi dirver?