I've been estimating about 170m for a while now. However, if I have to choose between under or over that amount, then I'll choose over. Switch still has a lot of life left in it. Even after Nintendo releases the successor system, Switch will keep selling. The 3DS kept selling decently even after the Switch released, because it was still supported even after the Switch released. Now if a disappointing system like the 3DS can keep selling, them you better believe that the Switch will keep selling.
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox