NA does support folders in the form of "aggregators". Each user can create multiple aggregators. You can visit my old 4.6.3 dev site (screenshot) to see a template that actually displays them 😉
In any case, as long as we retain the view where views from all sources are gathered on one page (unlike Bloglines, which displays each source on separate pages), I'd like to retain explicit purging.
/Guan
