Just to make sure no one takes this thread the wrong way, I’m going to keep this here. I have never, ever, not once, had a power issue on the x and y axis, even when running steppers half the size that we use now.
Yes 24V is beneficial, but not by very much. Most of my cuts are run at 15-20mm/s. I like that speed so if I need to I vary the depth of cut more than the speed of travel. There are lots of ways to squeeze out a little more, but series has been by far the most dramatic, it surprised the hell out of me.