Note, they make an assumption which cannot be derived by data: 65% adoption of the base configuration, 35% adoption of the high-tier configuration. While it makes sense on paper, we don't know how many units VALVE even produced and produces of both. I remember VALVE saying they were surprised how many of the high tier models of Steam Deck were sold back when it launched. Also the enthusiasts and early adopters probably would like to buy the higher model. I can see that VALVE started with a 50/50 distribution, and based on demand shifts AND availability of SSD towards one. All around its still a well made and educated guess of the numbers, based on the little data we have.