"Wooah, we need to toggle a class here!" "We got jQuery for that!"
"We also need to.." "Oh, we got this for that!"
Take this page as an example. It freaking huge, and the writer seems to think he has done a good job optimizing it now.
The page is really simple, and still a 1.66 MB JS bundle is required to even begin rendering the page.
And still the page doesn't work properly if you just do something as simple as view one external link and press the back button in an attempt to get back.
I know of a JS framework that might fix it, and it's only 7.6 MB. /s
Seriously, people should write about stuff they know.