The Vita has life. I owned one when it first came out and games and game selection was horrible. Now it's better.
I'm not going to make potshots at you, though, and about the 2DS/3DS. Why make them at me? Oh well though.
What happens when you get through your current backlog of Vita games that you missed while in Nintendoland?
And honestly? I really think that at this point it would've been cheaper just to have bought all of the consoles ONCE instead of constantly selling and buying. That's really just short-term thinking logic, as I'm certain that the amount of money you lost on each deal since you started your game of musical chairs is enough to have been able to afford owning the Wii U, 3DS, Vita, and possibly even a PS4 or Xbone by now. At the same time.