You can get rid of THAC0 if you just use this simple rule: roll d20, add the opponent's armor class (plus your own to-hit bonus if any), and a result of 20 or better is a hit.

That's true; it's easy to forget that THAC0 was a simplification from 1e.

Though that kind of reinforces the point.

Yea the salient point there was the second part - whether it be hit tables or THAC0, 5e rules would expedite play.

Course some of us will sit there and say y'all should just be playing 3d6 instead, but I digress...

Actually it was introduced before 2e but wasn't a core system in 1e.