Plus ceramic pistons are now common, which also help isolate heat to the rotor/pad interface. I was breaking in a new set of pads a while back and after a few loops of riding, braking hard, letting off, rinse repeat i squirted some of my water on the pads and it sizzled and steamed like I was frying eggs lol. I thought this was the perfect opportunity to feel how hot the calliper gets and it was barely noticable.
anyway, this is now a few years old already, but i keep referring back to this as it was a substantial lab test. There were not a lot of DOT filled systems at the top of the pile when it came to pure braking power.
Also, objectively the most powerful bicycle brakes you can buy (Trickstuff) uses Bionol now (sunflower oil lol) as fluid. Need to try some, apparently it can be used in any mineral oil system: if the color of the bottle hints at the color of the oil, then we know what sram now uses in their ‘mineral oil’ brakes.
“Hydraulic disc brakes typically use either mineral oil or DOT fluid, but the Maxima brakes are filled with something a little different – sunflower oil, or Bionol to be more specific. Created by Danico, the initial boiling point of Bionol is said to be 300-degrees Celcius, which is higher than mineral oil and DOT 5.1. It's not only for Trickstuff brakes, though; Bionol will also work in any mineral-oil operated brake”