Meta note about my particular printer from 2006: I have a Xerox Phaser 6120EN (which is color) and I chose it specifically over the HP Color LaserJet 1600/2600 at the time because of its wide compatibility with older computers. In 2006, an 840av was unironically my main sideboard, not as a vintage thing but as an "IRC while I do photoshop batch jobs on my G3/G4" thing, and my other machines were mostly OSX, but I foresaw a need to print from system 7/8/9.
If I were to pull it out of its box and turn it on I don't at all doubt that my Plus would see it on the network and be able to submit a print job, but one of the color toner cartridges ran out and I need a new one and new color toners for this machine are $115 or so and for that money (
approximately) you can buy an entire whole new black-and-white (sometimes multifunction) laser printer.
For me, my printing needs in 2006 are way different to what I'd realistically need in 2020, so it would be fair to say that I
am unironically considering getting a cheap new printer that only works with modern computers, because my need to print on 68k Macs is vanishingly low.
(To be honest, my need to print
at all these days is vanishingly low and that's the main reason why a low end laser is at the top of my list, if you print once a week or more then you might be in the realm where "continuous ink supply system" inkjet printers are worth looking at, and, HP has
a CISS-like laser printer called the NeverStop which similarly has a fairly low $/page over time, but of course it costs more up front to buy the machine than with their least expensive lasers, where the toner-drum cartridge might give you 1000 pages but cost $100.)