> As React webapps get large and start to contain a lot of complex components, they often do not perform well and manifest low FPS in browser.
Is this something you have actually experienced? Can you cite an example of running into this issue? I've built fairly complex UIs with React (tables with nested dropdowns, financial statements with a lot of data points, dynamic charts / graphs, elements with animations, etc. and haven't run into this issue.
The only time I've seen people have trouble w/ performance is when they use something like Redux or Apollo on top of React. The problem in those cases of course is Redux or Apollo, not React itself.