The command gen-flow-files has been around a while now, and it's been almost untouched since it was released as an experimental command in v0.32.0 about a year and a half ago. I'm unaware of any libraries using this in production (probably because for most use-cases it just doesn't work).

I think there are dangers of leaving such a buggy/experimental command in there with no active intent on fixing/updating it:

• Library maintainers could be waiting indefinitely for an update rather than seeking out alternative means (like flow typed or flow-copy-source)
• Library maintainers might be publishing buggy lib-defs without realising it.
• Or worse, they can be frustrated by gen-flow-files so much that they abandon Flow types altogether.

I think the command should be deprecated and ultimately removed, and documentation updated to reflect the official recommended pathway to publishing types, whatever that may be.