When I introduce it to a new team, leaving js/jsx as valid and making TS optional is usually good enough. Whether through peeking at your TS code or just being

When I introduce it to a new team, leaving js/jsx as valid and making TS optional is usually good enough. Whether through peeking at your TS code or just being curious, usually they come around, and if not, they are still responsible for their code. The tradeoff is theirs to make