GP is saying they would like for flow to offer some leeway for things like this:
https://flow.org/try/#0MYewdgzgLgBAZiEMC8MDaByBIMF0DcAUKJLNA... (i.e. not nag on a "technically-it-could-be-non-string-but-I-know-for-a-fact-that-this-is-fine")
LSP is kinda irrelevant to the argument that they feel that TS+VSCode is geared towards real-world productivity, vs the feeling that Flow prioritizes academic goals over devexp.
