They are still used for air lines or places that indent the paper.
Source: I'm in Computer Systems Technology and we just got done learning about them.
Impact printers are printers that create an image by physically striking an ink ribbon onto paper. The most common types of impact printers include dot matrix printers, daisy wheel printers, and line printers. Among these, dot matrix printers are still the most widely used today, especially in places like banks, warehouses, and businesses that need to print multi-part forms or continuous stationery. They are valued for their durability and ability to print through carbon copies. However, impact printers are much slower and noisier compared to modern inkjet and laser printers, which is why they are rarely used for home or general office printing today. If you're choosing a printer for everyday use, inkjet or laser printers are usually more practical in terms of speed, quality, and availability of consumables like ink and toner from suppliers.
"Depending on the amount of dots used in the picture, dot matrixes can be very clear. How ever, most people and businesses prefer to use injet printers, because images are not created by groups of dots, and can be printed on regular 8 1/2x11 paper."
Dot matrix printers
A impact printer uses a head or a needle on a ink ribbon to make a mark on the paper. Like dot matrix printers and daisy wheel printers.
typewriters, dot matrix printers
A impact printer uses a head or a needle on a ink ribbon to make a mark on the paper. Like dot matrix printers and daisy wheel printers.
old style computer printers
laser, inkjet and dot matrix.
printers.
dot matrix, ink jet, laser
Dot Matrix Printer
Because the dot matrix (impact printer) fires pins (9 pins or 24 pins) against an inked ribbon to print dots on paper.