Hard for it not to. Nintendo will be shipping around 5 million for FY17, and IIRC the 3DS was at 57 million by April of this year, putting it at ~62 million units by April 2017 (implying Nintendo's estimates are 100% correct)... and even if it doesnt outsell it by the end of FY17, I expect Nintendo to ship like 5 million more by the time it stops selling (around 2019-20 imo).
Edit: If what I said is too confusing (re-reading it feels that way ), I expect the 3DS to sell at least 67 million units lifetime.
Bet with bluedawgs: I say Switch will outsell PS4 in 2018, he says PS4 will outsell Switch. He's now permabanned, but the bet will remain in my sig.
NNID: Slarvax - Steam: Slarvax - Friend Code: SW 7885-0552-5988