I remember printing on my NeXT Laser Printer in 1992 or so. Great experience, fast, reliable, high quality output.
Rare the pages that did not come out at rated engine speed.
Canon engine, tweaked to 400 dpi instead of 300, with the host doing the rendering in DPS (anyone remember machportdevice?) and a custom DMA interface delivering the bitmap directly to the engine IIRC.
No interfaces on the printer itself, no ports, no Wifi, no LCDs, no memory, nada. And none needed. Printer is for printing.