I'm biased against React because I manage a team trained in classic web design who now have to manage a giant React codebase and learn its special way of doing things, and it's a slog.
What special way is that? One of the big draws of React is its minimal api surface, and the ability to write standard JS alongside of your presentational HTML.
I am also curious what "classic web design" actually means, I have a theory, but I am curious all the same