Except companies like Samsung throw out dozens of new models per year, which all differentiate only marginally, and none of them gets a SFF while maintaining higher quality of features (i.e. no cheap phone with 720 display and such).
Sometimes they get it right, like with the Samsung A40 from 2019, only to not pursue the sales for a true successor. Heck, me and a lot of my friends and relatives bought an A40 because of its size and fantastic display.