The FB-Series is technically outdated for some years now, it is very long on the market. It has some very nice details like the camera who checks the position of the media, and the possibilities for easy batch printing. But paying some hundred bucks for UV-lamps which should last 1´000 hours, but most of the time needing to be replaced after 700 hours, are not acceptable in times were LED UV-lamps last 10´000 hours. And, to be honest, the printing quality is not up to date anymore too.
For users who have bought the machine several years ago, another 5 years should be acceptable. Users who have bought the machine recently should have paid a relatively low price, so they should be able to pay off the machine too in another five years.
Another point: some of the components of that printer are not made by HP. The printheads for example are Toshiba-Printheads. The basic technic isn´t HP, it comes to HP with the purchase of the company Colorspan. Even the vacuum system of the service station is a foreign product (ok, just a simple shop vac). The availability of that parts is something HP have no influence.