I could still run it. I have a .gnus file that works with my current accounts (all Gmail/Apps accounts). The problem with Gnus is that nnimap is unbearably slo

I could still run it. I have a .gnus file that works with my current accounts (all Gmail/Apps accounts). The problem with Gnus is that nnimap is unbearably slow and quirky in its own ways, and nnmaildir, which you'd ideally use with something like offlineimap to make Gnus work on a local copy for speed, is such a weird non-standard one-off backend that it's really hard to sync back to the server. At least that was true a couple of years ago when I last made a serious attempt to use it. I think the modern emacs mail approach is probably either notmuch.el or mu4e, whichever interface you prefer.