Same. I evangelize TypeScript whenever I can. I don't think I'll ever be as efficient in JavaScript as I am in TypeScript, now that I've tried it. Granted, it has its quirks, but (especially when writing React) it's invaluable to me.
How does typescript compare to flow? I'd love to see a comparison with pros n cons. I haven't tried either yet and I'm curious if you have any recommendations re resources to read.
What about using Visual Studio Code with the compiler set on 'checkJs'? I've just started using TypeScript and I don't think I can ever go back to raw JS.