I had to write a large js files with jQuery recently. What can I say: after angular big jQuery code is.. big and long. It is harder to maintain. But.
We wanted to drop it.
Checked web analytics and saw that some guy with opera 12 recently made a good purchase. And opera 12 still attributed to some amount of ibcome that cannot be ignored. And we don't want to charge client for supporting such old browsers without jQuery.
My point is: with internal interfaces like admin panels, pwas and highly interactive sites - we use something fresh like angular. For hybrid mobile apps we use Ionicframework. Will be spending time to learn react/vue whatever gets released to that date.
But for e-commerce sites we are stuck with jQuery for a very long time.
Plus not all search engines are good with indexing RIAs and SPAs. And organic search is attributed to half of income for some e-commerce sites. Literally we cannot switch yo any modern library while it is the case.