JS only moves fast if you're a library developer trying to fight on the leading edge of things, such as with Solid. The only devs who should feel some pressure to change are people developing web apps in a pre-React way.
There are a lot of new libraries, but almost nothing gets to the level of React / Redux / NextJS / Webpack. You only really have to respond to change when something big like that happens, which is like once per 10 years.
Yup, and Angular as well. If you had bet on Vue in 2014, your bet would still be solid today. Things like Svelte, Lit, Solid, etc. are all waiting for their chance but it's not clear they will ever be as big.
There are a lot of new libraries, but almost nothing gets to the level of React / Redux / NextJS / Webpack. You only really have to respond to change when something big like that happens, which is like once per 10 years.