it's consumed in spades
Thank you LDLC for the fast delivery.
The CF400X promises 2800 pages at 5% (but I didn't understand 5% of what?). If I get to 1500 pages I'm already happy.
By comparison, their colour cartridges seem to hold up better.
HP advise to use their own brand to extend the life of the printer, so I stick to it because I think the price/quality ratio is still good. I had indeed tested generic products on a previous printer and it was more expensive overall.
I'm not sure if it's a good idea to buy a new printer, but I'm sure it's a good idea to buy a new printer.