Exactly. I looked at eco-tanks, and aside from the fact that the tanks would dry out given how little I need to print, it was avoiding the evil printing companies selling those printers. That left Brother: Linux-friendly, inexpensive open printers. Kinda took them at their name.
I'm not trying to sway you - I've never had the tanks dry out. The summer months (when my wife and kids are out of school) the printer mostly sits idle. For whatever it's worth, I have one real complaint with this (ET-4550) printer: It's LOUD and slow, not a great combination. It sits about 6 feet from me in my office and if my wife has to print a 100 page PowerPoint for school - it's maddening. Luckily I have an understanding wife that tries to print after I'm done working for the day.
The tanks will probably not dry out. I bought my ET-4500 in 2017, and I'm only half way through the coloured ink from the original fill. They are still working fine.