Mastodon generates an RSS feed for every user. Check out their web profile pages and look in the HTML header. Most popular RSS readers will just pick it up if you paste the profile URL in.
That could be rather useful - many thanks.
As an aside, I used to follow various organisations' RSS feeds from Facebook, before that was shut down. It was a great way to keep up with their activities.
Atom was Google's answer to RSS back when they cared about an open web. As far as I can tell, everything that handles RSS also handles Atom, and they're exposed in the header in the same way.
Firefox users can right click on the browser chrome, go to Customize, and add a subscribe button that lights up when a page has a feed. It's not as snug a fit as what used to go in the address bar, but it still works.
> Firefox users can right click on the browser chrome, ...
... but I've made a note of your comment, and when I get time I'll go hunting to find out how it works. It seems to me that RSS/Atom/Subscription is going to make a comeback. Technical people are moving off other platforms and putting their output on their own sites, so some sort of subscription management is the way to go.