I guess it would depend on how willing you are to become a dirty pirate and steal all your games, because if you are able to buy a New 3DS running 10.7 or earlier, and aren't averse to pirating the entire back catalog of games, then there is literally no reason to not buy one. If you are interested in hunting down older games, or buy everything digitally, it's a soft yes. If you're interested in games that haven't been released, unless you absolutely need to play Pokemon Sun and Moon, the answer is no.
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