Wow...one mistake and you're eating armco there. I get spoiled here in Texas where there are only a ocuple of turns on all of the tracks where there's something bad waiting for you if you make a mistake.
I've found on turns with camber and room on exit, early apexing works. But yeah, I was taught late apexes early on because of the safety and skill issue. You really need to be able to be smooth on the controls (especially the brakes), able to rotate the car with trail braking and throttle. Also, able to drive with slip angle.
If you can't trail brake, rotate the car with throttle, and drive with slip angle...you shouldn't be early apexing or you'll be driving a BMW lawn mower.
2013 F30 328i Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red