The main use for dot matrix printers these days is in point of sales
operations and certain multiple document situations where copies of the
same document are required, so carbonless paper might be used to make
several copies at once.
However, many applications are either using thermal printers or even fast
laser printers, which can eliminate the need for pre-printed forms, and
careful registration of the text.
Most POS dot matrix/impact printers today are 24 or more pin and quite
fast, so no, there isn't a great deal of demand for early dot matrix
printers. I agree they are built to run forever, too bad no one needs
them anymore!
Art