Speaking of planned obsolescence, stay FAR, FAR away from printers that have a 'cleaning' function, especially inkjets. These will randomly start cleaning themselves at anytime , especially after powering on. During the cleaning process they will use some ink to clean the print head nozzle and the ink then gets dumped into large block with sponge inside, designed to last the 'expected' life of the pinter, when the sponge is full and starts to leak, printers EOL. I once had a brother copier, fax and printer- scanner combo machine and it would eat through ink fast. I gave up and started putting food colour in it or salvaged ink until it broke.
Also had an epson inkjet printer given to me, when i tried to refill its cartridges, they still said they were empty so must have had an eprom chip in them. This is like those Dell laptop batteries that just stop being detected and die after a certain amount of cycles, even though it worked perfect the day before. It has an eprom chip which locks out the cells. Replacing the cells does not fix the battery
HP inkjets.... I used to refill those and when I would take the cap off the cartridge, the 3 sections for the colours were not even fully utilized! In each colour section, the ink occupied only a bit more than half the space, the rest was an empty unused pit divided by plastic. There was so much unused space in there by design so the unit runs out faster.
Lexmarks, now those were fun, I could fill them up no problem and the spaces inside for each colour were fully occupied.
Today it seems that manufacturers have caught on about the ink scam, so now they sell 'tank' printers, where you pay big bucks for the printers but not so much for the ink bottles to refill the tanks. But im sure theres still little tricks involved to make you spend money
We have an HP 930c from the late 90s that still works perfectly. It had exactly that happen to it - sponge overfilled to the point that ink dripped on the table under the machine + was getting on every printed page. I disassembled it, washed out of it a Tom Riddle's diary worth of ink, and it worked perfectly ever since
Today's HP have some "ink subscription" program - basically reporting your ink use for an online "ink license" sorta scheme that informs your printer how much it can still print - I would very much stay away from something like that !