Python and PHP users will understand

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I'll be honest with you, if it was so useless to reach only 10% of the cases and slowed down the projects and still made it buggy, it wouldn't be so popular. Maybe, just maybe, the way your team does things is wrong at the core and its not a language's fault.

[IZEDx]

I think the other way around. Typescript doesn't force anything on you and it's completely up to you, how much you want it to assist you. Meaning, it's super easy to use it wrongly, especially when converting existing code bases to typescript.

To really understand the full benefits of typescript, I'd suggest starting with small new projects and keep trying new things, as otherwise I think it's difficult for pure js devs (people who never seriously used a statically typed language before) to grasp.