I sometimes wonder what is different about frontend JS community and ecosystem vs backend ecosystem that makes them iterate over and ship new framework every ot

I sometimes wonder what is different about frontend JS community and ecosystem vs backend ecosystem that makes them iterate over and ship new framework every other week. Is it a lack of standardization/specs or unwillingness to improve existing abstractions? I could be completely wrong, but it feels like building on so many abstractions, one tends to lose insight into the underlying stack and you eventually enter a diminishing returns territory.