UML

Raised as a usability problem by 8 people on Hacker News over 7 years (2016–2022), in 6 threads.

People raised many different problems with UML, but no single problem has yet been raised by 3 people in 3 different months and threads.

Unreviewed issues were grouped by machine: Claude Haiku labelled each comment as a usability complaint, named what it's about and summed up the problem in a line, and a small model grouped similar problems. Nobody has checked them by hand. Expect mistakes.

The newest 9 complaints

Inheritance arrow points upward, contrary to the reader's mental model2022-10-04
Notation is hard to read and interpret without prior familiarity2022-10-04
UML documentation and tooling are nearly unusable for the commenter2022-09-10
Diagrams become unusable when they try to show everything in the model2021-04-27
UML is convoluted and hard to untangle, having drowned in formalizing complexity2021-04-26
Diagram notation rules cause arguments about correct usage, distracting from the information being conveyed2021-04-25
Diagrams are ugly and unintuitive, so even experienced developers struggle to understand them2021-04-25
Modeling tools of that era had poor user experience overall2016-11-08
Inheritance arrows seem to point the wrong direction, which is counterintuitive2016-10-20