Comment by spect88

Matz hates (inline) type annotations and said many times that they're not coming to Ruby. IIUC he only allowed RBS (type annotations in separate files) due to community pressure.

A lot of Rubyists deeply care about code aesthetics and Sorbet annotations are unfortunately quite ugly. There are also RBS comments, which look a bit better, but tooling/LSPs are not quite there yet IME.