Can’t speak on behalf of 20+ users myself obviously, but I imagine this is the case. I would have never known scripts were possible had it not been for meandering my way to the forums while bored between reviews. I read through all of jprspereira’s Level 60 post and took a lot of their advice to heart, particularly about utilizing scripts. Compared to my first foray with WK before resetting earlier this month it has made the experience a lot nicer. Lesson reordering so I don’t have to slog through 60 vocab after hitting a new level (really irked me my first time around), custom self-study for additional practice options, detailed review timelines, typo catchers, etc.
I also imagine a lot of mobile only users just kind of stick with the base WYSIWYG experience in their browsers. There seem to be a lot of mobile users who weren’t aware of Flaming Durtles or Tsurukame judging by the posts in the update thread as well.