Incidentally I still shoot film myself occasionally, Ilford B&W on an old Praktica w/ Zeiss lens. It's slow, painful, I screw up 1/4 of the shots and occasionally destroy a whole roll while developing it. But it's fun. When it's no longer fun, out comes the Z50...
Wait: how could you possibly do a double-blind test? They'd surely notice the difference between a slide projector and a computer monitor. A digital scan of a Kodachrome slide is not the same as a Kodachrome slide projected with a good projector. The dynamic range from a projector is far greater than any standard monitor is capable of.
The digital projectors used in theatres are getting pretty close. A standard desktop monitor? No way.
I prefer the crutch of 12 bit RAW and Lightroom which usually gets me out of the same sticky situation :)
Quite the opposite. Reversal ("slide", "chrome") films like Kodachrome are more forgiving of underexposure, while negative films are more forgiving of overexposure.
Back in the heyday of chromes, it was common to slightly underexpose them to get more color saturation.