The phrase "jumped the bandwagon" has been around for over a century, and it's a well-known idiom that means to support or follow something popular or trendy at a later stage, often without considering its merits. However, there are many synonyms for this phrase that can be used to add variety and depth to your writing. One alternative could be "following the crowd," which means to do what everyone else is doing without thinking for yourself. Another possible synonym is "riding the wave," which implies going along with something popular for the sake of convenience or popularity. "Going with the flow" is a similar phrase that suggests following the current trend. Regardless of which synonym you choose, they all capture the essence of jumping on a bandwagon in some way or another.