Of course everything is speculation at this point, but I felt this would make for an interesting discussion.
In FFXI we have multiple jobs to level, thus old guys like me that have been in FFXI for 5 years or more just have more and more jobs 75. We vets see newbies when in the dunes, and honestly are marginally stronger than them (merits, random rex gear like salvage/low level quest/misc, funds to buy better gear), but not by much.
In other games long-time players have maxed out a character, moved on to a new one, and kept going so by the 5 year mark they have a small militia of maxed out characters, thus seeing newbies when they are leveling up a new character.
In yet other, mostly MUDs, a brand new character is a joke compared to the vet character who has inherited, perm'd, whatever so many skills that they are essentially gods compared to a new character at "level 1",
How do you think SE is going to address the elite and noob player over time? What will a player have to do after 5 years? How will a player joining in 5 years mesh into the community?