Until you go to lift it! Eagle's rack weighs probably around 30-33 kg / 66-72 lbs without the Axe-Fx 3.
So it's no wonder they're mostly popular in studios, or bigger stage productions where you have roadies cart a refridgerator rack on wheels from a truck to stage.
With digital systems being able to be quite small these days, it would be cool to see half rack width or Eurorack format units become a thing in guitar gear. Or even pedals with no footswitches, just jacks for MIDI control.
The rack format is easily the worst candidate for larger screens too. That's instant 3-4U.