However, if the JS build system was actually sane, TS would be the default choice. It's a superset of JS, so saying no typescript necessary is like saying a horse gets me from a to b, no need for cars. TS is objectively better for many use cases and situation if you spend an hour learning it without all the build tooling nonsense getting in the way.
It's equivalent to a company using assembly when they could choose to port to C because assembly gets the job done.