Most of this comes down to getting past the fear of coding/programming. And it is a powerful enabler, even reshapes thinking. She recently came up to me with saying “why should I write this in Word? We have markdown and I bet there is a tool where I can style this and generate a PDF”.
The reason I use React is mostly its composable, simple templating abstraction and the fact that it works both on the server and the client.
UX is generally improved. If a site/app is done well, it will work w/o JS enabled, loads fast and transitions even faster.
JS typically makes things better, not worse. What makes sites slow is putting in external and/or heavyweight stuff: ads, analytics, tracking, fonts, images and so on.
In fact the scoped CSS makes Vue files superior to plain html+css for non CSS experts -- organizing large stylesheets is hard to get right!
This always smells like "nobody could possibly do what we do" developer hubris.
The designers I've worked with on my last three large React projects could edit .jsx/.scss files. I don't really buy the idea that someone can learn web client design but it's jsx or whatever that's too much.
Css zen gardens was a fantastic idea that I’ve never seen realized in a real project with business needs. Maybe I’ve just been unlucky.
But it's less specific then that. When 6 years ago hiring a frontender they needed to just know html and css, now they need to be full blown devs.
Non-developers/designers were able to do a lot of the frontend stuff. With the "new" complexity of frontend development that's mostly gone.
I've seen it a few times with my own eyes that in teams the 1-5 frontenders specialised in html/css had a really hard time switching to react, at the same time more seasoned developers felt like fish in the water.
Considering the scarcity of developers that's actual a big deal, more work for developers while at the same time less work for traditional frontenders.