I don't know how anyone who's actually used plain Js and Ts in a large project can say it's a fad. For frontend it might be different, but as someone who usual

I don't know how anyone who's actually used plain Js and Ts in a large project can say it's a fad. For frontend it might be different, but as someone who usually touches the Js ecosystem through node, I pretty much won't use Js. Like why should I give up insane utility with negligible (if any) runtime cost, high configurability (with sane defaults), easy buy in (since all Js is valid Ts)? Maybe the last part is what you're missing? Most "layers on Js" needed you to rewrite or annotate all your code to get and value at all. But you drop a tsconfig in a project and you instantly get value out of it. What past layer on Js had that?