It’s… not ready for prime time. I’m optimistic that it can get there but right now the tooling is quite immature and the type system flexibility is not there for such a dynamic language as ruby.
Have you tried Tapioca (https://github.com/Shopify/tapioca) with Sorbet? Typing in general has ways to go sure, but I find this combination quite usable in my day to day.
Yes, but in dealing with parsing JSON in a dynamic way, we took a bunch of time to try to get things working elegantly and it didn’t go so well. Same with trying to set up a base class for a service object that could return any number of things.
Maybe I’ll check back in 3 years? But it seems to be A pet toy of Shopify, and for their needs.