nothing really big here...
#1, the count is there, but I've never seen one stop, and we ran a LOT of paper through those in the test lab (7-20 reams of paper a day was common). NVRam is true as well.
#3. Wasn't true a few years ago. HP cartridges are spendy, because they have the print heads included (so those never wear out).
#4 is well known (at least I think it was) and when I worked support, it was never an issue if a customer with an out of date printer said their new cartridge was having problems. Didn't even need sup approval to do an in warranty free call
#5 must be a recent change, as I used to (about 5 years ago) work in a US call center on 6+ year old products (of course, 90% of that was moved to Canada). There was still a small HP support team there last I checked. It WAS outsourced though (no HP employees in the building)
I always thought #7 was common knowledge.....although we would always support the printer, just not service it (if it was a cartridge caused issue)
#10 was wrong a few years ago too...I think I made like $12/hr or something. Also, if you swear, they can enforce a 3 strikes and your out rule (but we only usually did that if you were a dick)
#11 is true
#12 is somewhat true, but if you are in one call group, you cannot answer questions for another product group without sup approval (and normally we never asked)