Sony announced 83.8 million unites were shipped as of March 2015. VgChartz has the console over a million overtacked for the same time period and never fixed it giving off the image that PS3 actually sold more than 360 in the end....it didn't.

I don't follow sales much, but with the handicaps Microsoft started with, and the PS4's advantages over the XBO during most of this gen, I am surprised they were keeping up at all.

Yoshida said they sell 3 times more WW which has always been happening in past years. Also the 55%-60% is pretty common for Xbox consoles and based on some of the estimates from EA earlier this generation it still holds true for the XBO.

Have you not seen this graph, it comes out every month.

http://www.vgchartz.com/article/271185/xbox-one-vs-xbox-360vgchartz-gap-chartsnovember-2017-update/

The Xbox 360 never had a Xbox one X hardware upgrade, Microsoft would only announce next version of Xbox 360 without any update to hardware. The only reason Xbox one is not out pacing Xbox 360 is because sales slow down has people waited for Xbox one X release. But, with the massive November and expected numbers for December. Xbox one and Xbox 360 are back to being neck to neck in term of sales. You should see Xbox one outpacing 360 in 2018.

That's not true. Only in 2017 did 360 catch up to Xbox one sales. 

http://www.vgchartz.com/article/271185/xbox-one-vs-xbox-360vgchartz-gap-chartsnovember-2017-update/

I think Microsoft made the right move by announcing Xbox one X when they did even if they knew that Xbox one sales would slow down because of it. 

I'm not sure that's true.  Given the huge number of dead 360s by this point in its lifespan (many people bought new slim 360 bundles to replace their old units, that were either finally out of even the three year warranty or because of a lack of trust in the replacement units people were getting), I'm not sure there aren't as many active/working Xbox One units as there were 360 units.  I see the PS4's greater popularity as a result of Sony having captured a good chunk of console sales that were going to the Wii this time last-gen, with the Xbox One holding steady.  It's hard to deny that the RRoD inflated 360 sales.  How many people this far in were still using their first-gen 360 units in the previous gen?  Almost no one.  Lots of people are still using first-gen Xbox One units.  That at least mitigates, if not entirely compensates for, the sales difference in unit numbers.  It's not a surprise to me that Xbox Live engagement is at record highs.  It's because most of the Xbox One units still work, something that couldn't be said for most of the Xbox 360 units last generation.

Thanks for the informations, interesting. It's no surprise. I have 3 friends with Xbox360 - but they have NO interest for a Xbox One in future. And 2018 will not be better than 2017 for Xbox, i think. At the same time, the PS4 has its strongest games year ever (with 2019). good and big exclusives / games are very important.

I member it differently. Very often i read how the X1 gets outsold 2:1 but on the bright side still performing  better fhan the 360. 

Xbox 360 Sales: 1.17; 6.8; 7.8; 10.9; 10.9; 13.25; 13.88; 10.68; 6.2m
Xbox One Sales: 3.07; 7.9; 8.6; 8.37; ~8.5m........   

There has never been a hardware update like Xbox one X and PS4 Pro .... Xbox One X was a much bigger disruption then the Ps4 Pro upgrade which launch in the same year. 

Sales were expected to be higher this year and now they just made the Game pass announcement which is only going to help Microsoft sales. 

No, 360 had a massive boost in 2010/2011 thanks to Kinect.

360 will start dominating XBO this year.