You can't expect most code bases use JSX as template. It's not even praiseworthy if the framework provide every possible choices. Just like you can do anything

You can't expect most code bases use JSX as template. It's not even praiseworthy if the framework provide every possible choices. Just like you can do anything in C++, but in practice it's a terrible language to work with. For class part I'm sure it's just whatabouism... And for expressions it's not praiseworthy to put in the template, but my point is why not reusing JavaScript semantics rather than implementing you own that differs from JavaScript?