What's the current state of printers on Linux? Are there any decent options?
Years ago, Brother printers seemed to be one of the few feasible options. What's the printer landscape like today? Are there any plug and play options that aren't part of some ink scam?
This is the correct answer. IPP Everywhere support is often advertised as AirPrint and sometimes as Mopria, which all means that it will work with CUPS without extra drivers.
In fact, with the upcoming version 3, CUPS will drop direct support for non-IPP printers.