Whether it be electronics, automobiles or medical equipment, the manufacturers should not be able to horde “oem” parts, render your stuff useless if you repair it with aftermarket parts, or hide schematics of their products.
Summary video by Marques Brownlee
Great channel covering and advocating right to repair, Lewis Rossman
Basic blender went bad (motor ran but spindle wasn't rotating). I wanted to disassemble to see if it could be repaired. Three of the four screws were Phillips head. I had to cut the casing open in order to discover why I couldn't unscrew the fourth. It was a slotted spanner.
A complete set of security screw bits is ~20 bucks and they're far more useful than I realized until I acquired them.
I think this was at the bottom of a deep hole, as you can see where the plastic was cut around it. A standard bit and holder wouldn't fit down that, I don't think. What the other guys said about a flathead and dremel/grinding wheel is the only option really, but you'd have to be able to ID the little fucker first.