Over the last couple years I've worked at a F500 company with no TS and a startup which auto generated TS types (so i.e. 100% TS) and guess which company moved faster? The F500 you literally had to get on multiple meetings across multiple teams just to figure out what values something might be. It took months to onboard new engineers and the bus factor was insanely high.
Once you've worked in a codebase with consistent TS usage, it's very, very painful to go back to vanilla JS, so imo yes, TS is worth the investment.
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Over the last couple years I've worked at a F500 company with no TS and a startup which auto generated TS types (so i.e. 100% TS) and guess which company moved faster? The F500 you literally had to get on multiple meetings across multiple teams just to figure out what values something might be. It took months to onboard new engineers and the bus factor was insanely high.
Once you've worked in a codebase with consistent TS usage, it's very, very painful to go back to vanilla JS, so imo yes, TS is worth the investment.