I got into the series through the Enhanced Edition of the first game so I guess I dodged the bullet.
I dodged it too, got the game on 1.3.
But we're still experiencing the fall-out from it in the Support section. Typically "I just got a new PC with Windows 8, installed TW2 from my original disks, and it won't run".
DRM on disk - the gift that lasts forever.