Earlier quoted context omitted.
so the big reason here is actually React. Whether you like it or not, the developer momentum behind React/Vue is massive. And jquery works in weird ways with React/Vue. You can still make it work, but people are choosing to go with other frameworks. so the removal is not really a "remove jquery" thing - but more of "make sure the framework javascript doesnt screw up react". For example, look at some of the earliest c…
What does jQuery do to play poorly with React that this reimplementation doesn't?
Incidentally one of the most interesting react apps that plays super nice with jQuery is the new WordPress editor. I have nothing but respect at how they made it work with the tons of bad js code out there.