> But if the goal really is comparison with *popular* open source licenses, well, excluding BSD sounds like cheating :-) </troll>
It wasn't actually meant to be a comparison to popular open source licenses. Clearly GPLv1 is not popular as a specifically chosen license, and MPL 2.0 is (AFAICT) not used much outside of the Mozilla ecosystem and LibreOffice. I picked GPLv1 to show the historical evolution in length of the GPL, and I picked MPL 2.0 because it's the most interesting case of a post-*GPLv3, pre-copyleft-next (weak) copyleft FLOSS license.
I have easily concluded that you can't make an effective, modern copyleft license much shorter than the Apache License 2.0, hence I didn't bother to compare to the popular minimalist pre-modern BSD and MIT variants.