If KeplerL2 was right (and even Welfare admitted to it) that Xbox hardware revenue data consists of revenue from expansion cards, headsets and controllers, too, then indeed calculated sell-in/sell-through numbers of Series hardware must be inflated.
Additionally, and this is only a repeat of above, I think no numbers support the concept that Series sold 8m units globally between July 2024 and July 2025 - certainly not sold-through.
Then we also have cumulative data from AMD and Sony, which especially from AMD say that Steam Deck chipsets are also represented in their custom designed unit.
And then there's the fact that it's simply not possible that the Series sold almost 50% outside of the US looking even at estimates. The European and Japanese market estimates went nosediving not long after launch. We almost have a 10:1 ratio even globally as of June 2025.
And as my latest calculations of the estimates, they showed a -29.5% decline year-on-year, whereas Xbox' official revenue decline was at -22%. This gap to me can't be explained by the price hikes since May 2025.
In fact, it at least supports the idea that VGC estimates are inflated by revenue factors outside of Series hardware, since their official hardware decline doesn't even know about 7% additional revenue found in the estimates.
Again, this is no criticsm whatsoever towards you and your team and efforts, since Microsoft not providing decent numbers is the biggest flaw for years. It's despicable.
I truly believe that as of today, there are more things indicating/supporting the hypothesis that Series haven't even shipped 30m units than confirming it sold-through 33m units.
But I understand the decision to let estimates untouched as long as we don't have any real and undeniable source of truth in that regard.