HP once updated printers to reject ink they owned, and it worked

At the same time, I'd like to point out that HP seems to be making it a hell of a lot more obvious these days as to what you're getting into:

https://i.ibb.co/pBw1xwtB/IMG-3807.png

Every single HP printer I've seen at retail now has giant warnings across the box for dynamic cartridge security and the managed supplies printing contract on offer (aka Instant Ink). I also noticed their last packaging design didn't mention Instant Ink as prominently, but quite a few models have had a giant section on the box explaining that they now use dynamic security and that firmware updates will continue to maintain the effectiveness of their measures.