I feel I've noticed an upswing in RSS recently, but I'm not sure if that's because I'm looking for it.

A lot of people I follow on Twitter (and myself) seemed to quit Twitter around November last year. Some of them went back to blogging instead, and some others went to micro.blog, both of which use RSS as the syndication method.

Feedly also added keyword mute filters to their RSS readers late last year, which I think might be helping adoption. (Lots of personal and news feeds become more tolerable when you add a few political keywords to the mute list.)

But that said, most of the people I follow via RSS only have double digit RSS subscribers. Those same people have/had 10x - 100x the followers on Twitter and Medium.