Yellow is the boot pin, Blue is the enable pin. Sorry I changed timescale but nothing interesting seems to be missed.
USBC no driver no cap
USBC with drivers…way less voltage, not over the threshold
USBC w/cap no drivers. adds a little bump plenty of power.
USBC w/cap and drivers, cap makes it worse!
MicroUSB No drivers
MicroUSB Drivers, still a voltage drop (.4v?) but not bad.
P.S. I accidentally unplugged a driver while it was powered up and heard a little snap. Just tested the board and drivers with steppers and it all seems functional still!!! How cool is that. No promises that ever doesn’t kill something again.