Mostly because React was yet another "we're so much simpler/uncomplicated than all that enterprisey Java" sale job (just like Rails was) and lo and behold, Reac

Mostly because React was yet another "we're so much simpler/uncomplicated than all that enterprisey Java" sale job (just like Rails was) and lo and behold, React went full enterprisely in like less than 12 months (at least it took Rails something like 3-4 years to get to full complexity, and Rails/Ruby contributed huge amounts of groundbreaking frameworks and idioms along the way).