I agree, but for those considering using flow please beware that it's not a trivial undertaking. I recently converted a small app. There were several mind bende

I agree, but for those considering using flow please beware that it's not a trivial undertaking. I recently converted a small app. There were several mind benders—beyond basic types, annotations can get pretty tricky—and the tooling isn't quite seamless. This is not to discourage you. You may well decide it's worth the effort.