I keep reading threads like this one: http://www.mmo-champion.com/threads/...2-actually-did where people refer to 'the trinity' or 'the holy trinity' and it's been bugging me because what they are referring to, the now standard mmo roles of tank/healer/dps, is not really what the term refers to, at least not originally.
In the interest of keeping the history (history or trivia? lol) of the genre alive, I thought I'd share some of my old-timer knowledge on the origin of this term. It comes from classic EQ way back in the early days of the Ruins of Kunark expansion (might have been coined in the original game, I didn't start playing until Kunark though.) It is important to note that it did not refer to group roles at all but rather to individual classes. Those 3 classes were warrior, cleric and enchanter and it was a widely held belief that if you played one of those classes, you had no problem finding groups (unless the server knew you were terrible.) Back then in EQ you needed a group for just about anything and people would sometimes be sending zonewide messages looking for groups for hours and then a 'trinity' class could enter the zone and announce they were looking for group and have 5 offers in 20 seconds. So in essence, that widely held belief was actually pretty true.
I should probably mention why those classes were so desired by groups. Warriors were far and away the best tanks. Paladins could tank but they weren't in the same league (there were also other reasons but I won't go into them for the sake of brevity.) Clerics were far and away the best healers. Druids and Shamans could heal but they both lacked the godly Complete Heal spell that Clerics had and that made them greatly inferior healers. Enchanters were crowd control guys. There weren't any classes even close to them with their assortment of mezzes and attack speed slows. They were also the only class with a mana regen buff which was a must have for mana users. Basically you could make a grind group without these 3 classes but if you were going to do anything hard (you know, where you might get a decent loot drop) you needed them so they were in high demand.
Basically, even if you change the definition of the original term to include class roles and not just specific classes, the holy trinity has been gone since WoW came out because that game lessened the importance of crowd control to a great degree and spread the abilities to many classes. It's now a 'holy duality' if you will. DPS was never part of the equation and never will be because DPS players are a dime a dozen. Not saying that to demean, I usually play a DPS main myself but it's a fact that blowing stuff up is more fun than being a meatshield or a healbot and it will always attract the majority of players. I would go so far as to say that if a new game came out with 8 classes and 6 of them were healers and tanks and 2 were DPS, the 2 DPS classes would have more players than the other 6 combined :P
So what GW2 has gotten rid of is really a holy duality and not a trinity and thus ends your MMO trivia thread for the day