Hear me out: We all know that the Switch has been consistently outselling XBOX One, to the point that it now has nearly 40% of XBOX One's total sales, in little over a year since it launched. This is incredible, and provided Nintendo kept the same pace, and XBOX One ceased to sell at all, it would be likely that Nintendo would top its sales within 14-18 months time. 

Of course, the above scenario is impossible. With XBOX One X, Microsoft has managed to resurrect the platform's sales, and they could well perform much higher than anticipated in 2018. Nintendo, on the other hand, would pretty much have to surpass their first year, which sounds impossible at this moment.

I understand that eventually, given current trends, Switch could outsell the XBOX. But if this happens at the twilight of this generation, then it would be a Pyrrhic victory. 

Will the Switch surpass XBOX One (vanilla, S, and X) sales?

It will most definitely outsell it.

Is this an April Fools? Of course it will outsell it - it will almost certainly double the Xbox One in sales.

I'm trying to work out if you're asking if it will outsell it before the next Xbox comes out, or if you're asking if it will outsell the Xbox lifetime.

Because lifetime is an obvious win for the Switch. Xbo will sell under 60m lifetime. Switch will do more then that.

Will have outsold xbo before the end of 2020.

I guess my question is whether it will outsell it, but it is important to factor in whether this will be before or after Microsoft has released a successor. 

Yeah it's increasingly likely that switch will sell more this year than last year and Switch will probably be king sometime in 2019

Yes, it'll outsell it in 2019.

Yes, it will. By the end of  March 2020, it will be ahead of Xbox One. 

Yes, without any doubt. The recent XBOX upswing is too little too late. I except the Switch to pass Xbox in 2020.

if no new revision of the Switch hardware and XBOX One continue to have the best selling multiplatform games. I doubt it. The Wii dropped it sales maybe in 6th year? Switch can also have lower sales toward its 3rd or 4th year if no hardware revision.