Re: HP
The LJ 2400 was my breaking point with them.
I used to, as part of my IT consulting work, sell HP printers. For many years they were the most reliable, bulletproof laser printers I could sell.
After installing some 2400s, the trouble started. Those printers would not work for very long, and at about the same time HP decided my shop wasn't worthy of being warranty repair authorized or even getting parts any more.
I never sold another HP printer. If a client insists they want HP, I do my best to discourage them, and if they get one from somebody else anyway I won't support it, they can get help for that from the asshole who sold it to them.