Not that I think download metrics is the best metric to decide that, but even with that, flow-bin has almost half a million of downloads per day. That's far away from dead, at least in my world. And I'm guessing that doesn't count anything from Facebook as they most likely run their own registries.

flow-bin has substantially fewer downloads than coffeescript and both are declining. That is a dead project.

https://npmtrends.com/coffeescript-vs-flow-bin

It's not as popular as typescript but not dead, it's consistently active for a decade [0].

Compare it with typescript [1] contributions if you want.

[0] https://github.com/facebook/flow/graphs/contributors

[1] https://github.com/microsoft/TypeScript/graphs/contributors

Don't you find it interesting that node-fetch is slightly less-dead otherwise has exactly the same "aliveness" as typescript [0] from your source (click 5 years)?

[0] https://npmtrends.com/node-fetch-vs-typescript