Mono culture provides an average or worse UX experience but the sameness element hits many humans subconsciously.
The JS problem was solved with jQuery.
The JS problem was solved with jQuery.
(That said, the question of when to lean on existing convention vs. establish a new one is a difficult one.)
[1] https://www.nngroup.com/articles/ten-usability-heuristics/ [2] https://www.interaction-design.org/literature/article/princi...