I got a PSP about 4 or 5 years ago, & I had to make a master since I wasn't 18, so the sub was mainly used by me & had all of my purchases on there. Then last year, I got a PS3 & while it annoys me I gotta switch to the master to access PS+ (which I learned months AFTER I got my PS3 PS+ can't be applied to a sub), I can still play anything I get on there since PS3 allows multiple accounts. It was only recently that I found out that Vita only allows 1 account per handheld & sharing content isn't allowed. If I didn't have a bunch of stuff on my history list & trophies, I would've switched over to the master account long ago.
I don't get why Sony won't do what Microsoft does for Xbox Live & allows you to turn a sub account into its own, separate account once it's 18.
What is this whole thing about 18 thing? Couldn't you just lie about your age to not have restrictions? That sucks about the whole switching thing though, it would really annoy me. I really wished sony allowed 2 accounts on the Vita, I have 2 main accounts (one old and a recently made one) and both have quite a bit of purchases on them.