The largest issue with them is that they simply don't drill. It's as if they aren't sharp. Not for drywall, or wood, obviously, but aircraft grade aluminum, etc.
It's an old box, it's used heavily, and it doesn't appear to be in too good of shape. Rails are probably shot too. Good luck getting 30+ pairs of those.
You'd be surprised what's available in the $3,000 price range.
I bought Irwin's Hanson's USA Cobalt set --- the higher end Jobber ones, and I also ended up with one of their titanium coated sets.
Both the big sets of 29 pieces.
Ended up being pretty terrible drills in general.
The real hell is the replacements. They would break, and instead of...
I use the 411CF, and have two pairs of the straight 911ACF.
Honestly, the 35° 11" ones are the ones I use most often. Even the smaller version 496CF are one of my go to pairs.
The 15" version I've found to be too large physically to do what I need them to do.
I just disassembled my 5th Snap-on YA700 jack for rebuild.
There are two 28mm nuts on the rear caster wheels that spin regardless of the size of the ratchet. That's a job for a 3/8" impact gun.
There is a 46mm nut on the front of the hydraulic cylinder. That's a job for a 1/2" impact gun.
You pretty much hit the nail on the head.
Replaceable bit screwdrivers have their purpose for convenience, but you're not going to be taking off socket head cap screws on a Ferrari intake plenum with a bit that will drop down inside the engine.