Comment by burnt-resistor

steep and rbs don't work so well and are the wrong approach. sorbet is also the wrong approach but it works better. The Python 2 -> 3 way would've been a better way to do it but Matz chose an unwise way (separate files) that doomed it combined with a failure to type all the things and make it work. Oh, and very few Ruby gems are cryptographically signed and so most code is mostly untrustworthy. Making important things optional makes them unused and essentially worthless.