[pjmlp]

I guess xfig could be considered modern when twm was young, and I was playing with IBM X Windows thin clients on our university lab.

[hulitu]

Well, xfig does its job well without getting in the way (like for example the new MS Visio). And twm was looking old some 20 years ago. Now, compared with Windows 10, it looks modern.

[SemanticStrengh]

I can't wait for skeuomorphism to come back