Ruby typing 2024: RBS, Steep, RBS Collections, subjective feelings

I used Sorbet for years at Stripe, and although a little unwieldy in places, it was overall quite practical, and certainly useful for substantial bug reductions. About four years ago, Matz declared unilaterally that everything about Sorbet’s approach to typing was wrong, and established a similar but entirely divergent technology involving RBS files, companions to the traditional .rb containing type annotations. I’d never tried them before, but given they seem to be the preferred direction of the ecosystem, they were my point of entry.