Space is a big thing. I have a small no-name 6" under the bench with a green wheel for carbide. Haven't touched it in years other than to move it around.I've thought about it but never needed the capacity that they have, nor do I have the space for one.
The main grinder that is up and ready to go is a Mastercraft 8" with white wheels. I turned custom hubs to hold the wheels with less wobble but it still vibrates. That video looks interesting for making it smoother.
The other grinder, Lee Valley Tools, rarely gets taken out because it then requires some cleaning, oil into the cups (which eventually leaks out all over) and water. I bought this to do hand plane blades, wood chisels and knives. Again hasn't been used in a long time because there is not clearly defined spot for it.