(The following may only apply to me. I mention it to see if anyone else has had the same issue).
For a long time I have been only looking at the Discussion section and promoted main page articles. Just now on a whim I checked the non-promoted main page articles and found there were a whole bunch of them, some potentially quite interesting, that I had missed. My expectation based on past experience was that all reasonably good articles from main would be "promoted", but perhaps this has changed. If this has been going on for a while I've presumably missed quite a bit of content. Perhaps it should be made easier to find/notice these? It's a bit weird and awkward that there are 3 different non-uniform ways of finding posts.