There are packages and source code on their homepage and in the Ubuntu repo. I need basic print and basic scan to work out of the box on any OS including Linux, more or less. I can install drivers, but I have a bad feeling when proprietary drivers are required. Often vendors don't maintain them very well. (Contrary to popular opinion, HP has always worked for me.)
I want a scanner, the old one is broken. I don't need a color printer or inkjet, but I have little space, so I want something reasonably compact and consumer inkjet combo devices fullfill this.
I like the ecotank design, no stupid and overpriced cartridges.
I have an Epson L1350 and I installed Epson's proprietary drivers without any problems on my Debian. I think Epson is much more Linux friendly than HP