Why didn't we switch to 4e/5e?

[Troacctid]

Tro is clearly moving the goalposts. Her initial point was that a level 20 barbarian without magical items couldn't possibly hit a "typical" CR 20 monster, and now that the math shows that it can easily do so, she's instead asking for that character to solo one of the strongest encounters meant for the whole party at that level.

There's no point in arguing against that, really.

You just quoted me mentioning the DR in the very same breath as the AC.