Large MFPs and WSD/XPS are big No-no.
Maybe for smaller A4 USB home desktop printers they are OK but IMHO no MFP with LAN port should be using them....
On those 2 machines both K drums are really at around 150k counts.
And drive count matters also they've look doing a lot of color job vs monochrome....
Machine has 20k in total. First toners inside (OEM of course. Paper came out with clean picture but toner is smearing under the fingers (not fixed)....