Mine is that the useState hook is an actual plague on the entire React ecosystem. Regardless of your opinions of React, if you wanna use something then use it right.
Single digit can be 0, 1 or 9,9%.
10% market share wouldnt be half bad. ¯\_(ツ)_/¯
(PS: I didnt read the link because I don't care enough. I use it, and am fine with it)