So if I leave with Exos and come back when Viper gear is introduced which you know is damn strong for a condi build I wouldn't be behind someone in full Viper Ascended gear if I wanted to play the upto date condi builds?
And considering there are groups starting to use unofficial DPS meters in high fractals who are you going to take? The Exo pulling less DPS because their gear/build isn't upto date or the Ascended pulling a boatload because their gear/build is upto date?
Same with Agony Resistance. Who are you going to take in a high fractal? Someone in orange gear with no AR or someone geared with AR? If people come back to the game and want to do PvE depending on the gear they left with they will have to play catch up.
And to be honest even when geared with the build you are aiming for what then? It's boring not having a new gear treadmill to work for when your build is done.
There is absolutely such a thing as being behind in GW2 and it's wrong to state otherwise. It's just not as detrimental as other games unless you are wanting to pump out the higher end PvE content such as high Fractals or raids.