Is there any good reason to not roll a new toon for each class?

[Marowit]

OP what are you going to do when they inevitably add some form of character-based progression system?

Right now rolling new characters for each job may seem appealing to you but later down the road the complete opposite may be true... at which point you'd be stuck with a bunch of alts with gear and jobs that are non-transferable back onto your main.

Go ahead and roll an alt to evade the lockouts; just don't come crying when a future addition to the game screws you over by favouring players with multiple jobs on one character.

And maybe one day they'll just give everyone a character will fully geared level 50 everything. I can make ridiculously exaggerated statements about features that haven't been discussed and are probably only being brainstormed about if anything. It's beyond stupid to say don't do X because Y might happen before the game dies in a couple years.