Re: Dear HP.
HP printers are no longer the Deskjet 500.... My HP Photosmart D7260 had built in nozzles, the six cartridges were not placed on the printer head, but on the printer body, and it had long ink feeder ducts. It started to throw a lot of errors about the ink feeder system which no maintenance operation could solve. It was binned before I was able to deplete the remaining ink, because the touch LCD panel cable broke (inside the printer, as I found when I dismantled it before binning), and once a cartridge expired, there was no way to say to the printer to ignore it, the web interface was only informative.
My Canon, instead, has a user replaceable print head. It costed 500 euro, though.... (and the print head spare is not cheap).
Anyway, HP and Canon have heads with more nozzles than required, and "disable" clogged ones and map to another. Epson doesn't, and may have more clogging issues.