Neither Windows 1 nor 2 sported proportional typefaces yet, either, which
contributed to them feeling like "text"
interfaces.
That is wholly incorrect. v1 had them from the very beginning.
http://farm3.static.flickr.com/2428/3635572965_c18089d964_o.png is one
such example where you can see that Write has a proportional font.
You?re correct. I should have clarified that I meant the window chrome/UI,
not the content fonts in applications. Mac OS?s and other GUIs default
system fonts were typically proportional, which helped them distance
themselves from text-based UIs. Windows sat uncomfortably in the middle
until v3. :)
Marcin