[refulgentis]

One of those awkward things where I don't like it, and wouldn't go back to nulls that blow up. But as far as being the right tool/accessible it ended up winning use cases where I expected scripting and Playgrounds to have mindshare

[jb1991]

Playgrounds is so painfully slow that you can't really "play" with it at all.

[wiseowise]

Mypy is non-nullable, as far as I know. Unless you do Type | None. (Or was it TS?)