[Bizarro]

Does it? You need to know typescript (which you arguably should be using regardless of frontend framework)

That's highly debatable. We moved back to ES after using Typescript for years and couldn't be happier. We're much more productive than we were with Typescript, and that's with people that know the language. We get much of the benefits of Typescript by just using a jsconfig.json file in our project and using VSCode. The Typescript language service will typecheck JS code if you want it to.

And there is a big upfront cost for onboarding developers with Typescript and Angular.

[andai]

This is interesting, I'm mostly hearing the opposite experience. What made you decide to make the switch back?

[jf-]

It’s not faster, but it does improve code quality. I also don’t think it’s that hard to learn, but I’m coming from a strongly typed, object orientated background. Like the sibling commenter I’d also be interested in hearing your team’s experiences with it.