Brakes leaking within 200 miles-dot5 fluid

I'm betting.... parts store calipers and wheel cylinders?

It's NOT the fluid and no, you don't need to jump through a bunch of hoops to switch one way or the other. I'm curious to see who has seen first hand the problems that everybody claims but nobody seems to have proof of. I switched mine years ago and it's better than it would be after sitting with DOT3!

My first guess would be rebuilt or reman parts that have Chinese/otherwise low grade seals in them.