Dot matrix printers still do a job no laser or inkjet does as well: multi-part carbonless forms printed in one pass, continuous tractor-fed labels and tickets, and impact printing on receipts or documents that must go through afterward with a physical stamp or signature. Warehouses, service counters, and legacy billing systems keep them running for exactly this reason.
Buy by the form, not the printer alone: the number of carbonless copies a job needs and the exact form or label width are what a dot matrix printer must be sized for, since impact printers are chosen around the paper they run, not the other way around. Ribbon supply is an ongoing cost - confirm ribbon availability and cost before committing to a model. Where a legacy billing or inventory system only outputs to an impact printer, replacing the printer is usually far cheaper than replacing the software. COLAMCO supplies dot matrix printers and impact-printing supplies for the legacy forms and multi-part printing business, government, and education operations still depend on.