Note I never sed, "it can not be done". Also note the U2B video speaks of the problems of drilling metal with the tools shown and even shows the tools binding, stalling, etc.
I might (but, prolly not) try this with my DW portable battery drill motor, with sed clutch mechanism, but definitely not with my Milwaukee
1/2" drill motor w/o clutch mechanism (400rpm). The first time that Milwaukee caught, it'd probably almost break my wrist (BTDT!).You wanna try it? Be my guest. I'll use a stepped-bit or a drill press, thank you. ;)
As fer "the automotive industry", I've frequented those sound-system chop shops. Their "hole saws" were defeated by my '66 Dodge van dashboard. Perhaps they were using "old school" hole saws.
Yes, I AM "old school". Not all my drill motors are battery pwrd and have clutches. NOT all my pwr tools are StopSaws or Festools. Funny that a hobby like woodworking, which so highly prizes "old school" hand craftmanship, takes me to task fer not having the newest technology. That's OK. I unnerstan. ;)
BTW, my 1/4" paring chisel finally arrived. Yay!
nb