Comment by MaxBarraclough

I agree - I'd say clean rather than clunky. The old and (by modern standards) spartan appearance of Windows 95 applications doesn't mean the UI design is no good. Similarly, command-line interfaces can be very effective, even if they lack GUI gloss.

Somewhat related: long live the FOX Toolkit and its hard-coded Windows 95 theme http://fox-toolkit.org/screenshots.html