Not who you are asking, but I block a lot of communities (almost all of them political, when I want to look at political stuff I will go to other sources.) But I also sub to a lot of communities. It is possible for me to reach the bottom of my feed, but since I mostly check it between doing other things, it takes anywhere from a few hours to most of the day. And that's with me setting it to "Top Day" as my primary filter. If I'm really bored I'll do a pass through Top Week or Top Month. If I'm STILL bored, I'll set it to Active or New Comments, but usually by then it's like, "Okay time to go do something else" and I'll try to find some other activity to do.

This is a feature, not a bug IMO.