They also kind of suck. I'm not one for "the latest and greatest", but their output quality is atrocious compared to modern printers, they're loud AF, and I'm guessing it may have existed but I never saw a dot matrix that didn't have the perforated edge for feeding.
I think that’s a product of their time rather than the dot matrix tech itself. Paper feeding is hard. Tractor strips made it easier.
Dot matrix can handle regular A4 paper since the late nineties.
They're noisier than ink printers, but non-industrial quality can be pretty reasonable for office-level noises.
Quality certainly isn't on par with laser printers, but for text (both Latin and CJK), it's perfectly clear.