Game design has gone a long way since older MMOs where elemental resistance was a major component. Even in Guildwars 2 it’s largely used to give different secondary buff/debuffs, or to offer more variety of play style rather than as a rock-paper-scissors gimmick.

Personally, I’m fine with that…as is gives opportunities for new kinds of characters which don’t do predefined damage types, and eliminates the need for new damage types (eg. “Gravity damage” wouldn’t need to be created for a time mage).