EPSON's EcoTank System or HP's Smart Tank Plus are two of the best-selling ink tank printer systems, so you don't change the cartridge unless you refill a tank.
The main advantage is that using original ink from the manufacturer saves a lot on printing costs
The main drawback is the purchase price of the machine, which is substantially higher than one of cartridges with the same benefits
And if we compare the consumption with original EcoTank ink with compatible cartridges, the difference in copy cost disappears