ATOM feeds from public timeline
Currently, it's possible to have ATOM feeds on a per-user basis. There is no way, however, to have ATOM feeds on an instance-wide basis (public timeline.
foss.technology is meant to be similar to a newsfeed, and an ATOM feed (of just the posts (vs boosts/replies), though being configurable (or having multiple) is ideal) would be very useful for that goal. I'm sure it's possible to imagine similar use-cases in themed instances.