Mario Kart sells about 10 million a year, so GT7 could hit 8 million and be a big deal, but still be below Mario Kart.
So we can't really use a comparison with Mario Kart to judge GT's success.
Huh? that makes no sense. It's a perfect measuring stick since we know it sold around 7-8 million for three years, and around 10 million the last year. We can make some rough estimates with those numbers.
Let me look at this like a real nerd to explain my reasoning.
By these metrics, we can calculate that Mario Kart sold around 4-5 million in the U.S. last year. However, it's not likely it's hitting those same numbers at all this year, the last number reported was a bit over one million from March to June this year, worldwide.
Meaning, Mario Kart likely sits on well under one million sold since Gran Turismo launched in the US. Likely around 500-600k. Roughly.
GT7 had a bigger opening than GT Sport, which sold a million in the first week, which was about 160k in the U.S.
All in all, we can draw some rough conclusions based on the Mario Kart numbers, that GT7 launched big but was stunted and the sales dropped hard over the next several weeks.
If you estimate that GT7 sold 180k in the first week, the average it must have sold to reach Mario Kart numbers (600k-ish roughly), would have been 480k over the next 7 months.
AND, if you consider it likely sold the highest in the first few weeks, it must have sold very low numbers in the last few months. Especially since you would imagine that PS5 owners would be interested in new exclusive titles they can play.
That is all I am saying. I expected more.