One of the most subtle but pervasive forms of enshittification we see in products these days is the mobile-first approach.
Given the ubiquity of the mobile phone, targeting mobile users is both natural and sensible. However, all too often 'mobile first' means, in practice, 'mobile only', 'we've spared no effort on the mobile side and put no effort on the web side' or 'we just lifted and dropped the mobile approach onto our web UI'.