It’s never “great” to hold the clutch pedal in on any manual car because it loads up the crankshaft thrust bearing. Ironically, it’s less stressful on the thrust bearing to hold the RPM up (as in two-step/launch) - higher shaft speed = stronger oil film on any fluid film bearing.
I suspect the additional heat from holding the RPMs higher would contribute to a higher failure rate. Never had to touch the slave with the first vehicle but it was on the outside of the bell housing. (where it should be for a daily driven passenger vehicle)