I'm your average HN reader and so, I think, somewhat above average in technical matters and the few times I tried using RSS in Firefox it felt awkward and I wasn't quite sure whether I was doing something wrong.
The last couple of years I mostly read RSS on my iPad / iPhone or using Google Reader (which is okay'ish).
You are really using that awkward mobile interface of Google Reader? Why wouldn't you use an app like Reeder that is synced with your Google Reader account and has all your RSS needs covered.
For me following my Google Reader subscriptions via Reeder is a daily habit. I guess I use it more often than Safari on my iPad.
That said I would absolutely miss RSS if it was gone.
Shame that they messed up the Google Reader UI when they rolled out G+. Before that, consuming RSS was part of my morning routine. Now, the crappy web UI combined with extremely slow Android app have pushed me over to Pulse (ttp://www.pulse.me/), which is also RSS but with a much more limited collection of feeds to follow.
The last couple of years I mostly read RSS on my iPad / iPhone or using Google Reader (which is okay'ish).