Comment by kayfox

Things I have found that only do 10mbit:

Old CNC equipment.

Older Zebra label printers.

Some older Motorola radio stuff.

That SGI Indy we keep around for Jurassic Park jokes.

The LaserJet 5 thats still going after 30 years or something.

Some modern embedded stuff that does not have enough chooch to deal with 100mbit.