General Question REgarding Stepper vs. Servos

I often hear a lot about the limitations of stepper motor systems being the
potential for lost steps and the resonance issues at low speed. I have a
question for those of you running stepper motor CNC machines: do any of you
actually miss and steps? My systems have been up and running many, many
hours and have never missed a step. With a micro-stepping drive like
Xylotex (for small machines) or Gecko (for larger machines) isn't the
resonance issue resolved? I have zero low-speed resonance on my sytems with
the Xylotex drives.

I think the fact that steppers lose torque at high-speed is the only
limitation that seems to matter. Therefore, a stepper system will be
somewhat slower than a servo system. Or am I missing something else?

Not trying to start a religious war about stepper and servo systems, just
trying to understand the real differences.

Daniel J. Statman, Statman Designs
www.statmandesigns.com
dan.statman@...