I meant newer than the context I stated (1983). And also ground floor stuff that doesn't need internet (after install) and doesn't need a purchase/sign-up. Available by default or not too obscure to get decent voices.

There might be some half-decent voices somewhere, but it really just doesn't seem like it's night-and-day for the ground floor stuff from what I've seen. Maybe some vocaloid stuff but even that seems like a chore to do the phonemes manually to get expected pronunciation.