[aastronaut]

> my gut is screaming no

seems like you already made up your mind, so why bother?

TypeScript is helpful (or at least meant to be) for teams as it aims to block the cleverness of its individual contributors. Especially people only familiar with dynamic type systems are rather fighting a static type checker at first and "it's not helping them". A "strong" type checker should enforce everyone to write stuff in a simpler form and that gets in the way of productivity for some people.

If you can maintain your mindset and write your code in a simple form that could easily satisfy a type checker (coming from rust), then why bother with additional tooling if it won't provide more value to you? Or to phrase it differently: if you can maintain a strong mindset with confidence, bringing in additional tooling for that project later on, when it will be become plausible, won't be that hard. But if you doubt your mindset, it might be a helpful choice to let a type checker look over your shoulder from the beginning.