Rotating head copper tubing cutter - GIF

[Frank S]

It's only a hundred bucks, fits in a wall cavity (hand held can never do that), I know how to plug in a battery charger, I just ordered mine.

I'll give you that, plus I can see where a tradesman doing new construction would benefit in the labor savings on a daily basis especially if it had a built in debur and/or swedging attachment, but that might be self defeating from the added bulk. For someone like me who rarely does copper plastic or aluminum not so much.
I mostly do stainless hydraulic tubing and Milwaukee may offer cutter wheels for stainless I haven't checked.
For the odd times when I have to do wall cavity work I have an old one of these

Mine though is about 30 years old and it will fit in my pocket