They're also relatively big and ideally the thing they're standing on is attached to the wall or has a 40kg damper (i.e. a concrete pavement block or something similar).

Getting one with an enclosure like a Prusa Core One does wonders for noise reduction. Can even throw it under a desk.

I had one in my office for years and no one could hear it on the other side of video calls.

I've got a bambu A1 and noise is not a problem at all, I had to put that concrete block underneath it or it'd destroy the cheap coffee table it was standing on due to vibrations :)

Ah yeah that tracks. My enclosed Prusa MK4 is on a big stud-mounted shelf and my huge enclosed Prusa XL is on top of a heavy server rack with locked castors on a concrete floor. Vibration is not noticeable in either case.

Consumer printers work well (or even better) without any dampers, and they come in all (e.g. fishbowl) sizes.

I don't need a damper for the printer, I need it for the furniture it stands on.

Re size, the bambu A1 with the AMS lite takes up quite a bit of space - but the option of not having to switch filaments and not having to worry about filament running out mid print is sooo nice.