UI Scaling vs. Individual Adjustment
Current Status:
Size of icons and text may currently be adjusted in Preferences > General in the Theme section.
It is possible to independently adjust icon height and width, as well as font size.
Challenge:
While this does provide a very high level of customization, it is not the most user-friendly option.
Considering that accessibility is the primary use case for such adjustments, this approach might even become less friendly in this scenario.
Recommendation:
Rather than independent adjustment for each of these elements a single slider to increase/decrease size of all UI elements could be much more user-friendly and more effectively support the accessibility use case.
Comments
On the other hand, icons are way more recognizable than text. I know of some users that even shrink the icons (to 16x16), but increase the text.
They don't remove the toolbars, as still having a visual clue for duration and panning/repeat playback, but also don't want them to take up too much workspace of their scaled display.