[rollcat]

Flask also started as an April 1st joke, in response to bottle.py but ever so slightly more sane. It gathered so much positive response, that mitsuhiko basically had to make it into a real thing, and later regretted the API choices (like global variables proxying per-request objects).

[tilne]

Is there somewhere I can read about those regrets?

[rollcat]

Two days after the announcement: https://lucumr.pocoo.org/2010/4/3/april-1st-post-mortem/

I think there was another, later retrospective? Can't find it now.

[QQ00]

I second this, I need to know more. programming lore is my jam.