Now that the Reddit exodus is about a year old and the client apps have matured, what's the latest state of the above question?
What app do you use and why? I'm mainly interested in Android but suggestions for other platforms are also welcome. And if you are using multiple platforms, what's your primary one?
You can set the FAB to be a back to top button, and in the feed, tapping the feed tab button again while already on the feed tab, will scroll back to top.
I'm an android user myself, so I'm not sure what the gesture you're used to entails, but as the code for scrolling back to top is already in, adding another way to trigger it might be simple. You could hop over to the github or the !thunder@lemmy.world community and ask about it.