That's a really helpful blog post, actually. I thin the general pain points are the same as in your twitter discussion - the reducers quickly start feeling clunky with explicit casts or using two lines to export a constant for the switch statement. It's obviously a possibility to just forego type-safety in that part, but it'd be a shame.

Another general pain point (apart from the fact that a lot of the guides you find seem reasonably outdated) is the general build setup. Your guide seems really good, but generally setting up react redux and typescript is a bit of a jungle.

If you do end up writing a post, please let me know!