Not bad, but when counting sales inflation of games compared to the 90's its really closer to being 5 million to OOT's 7.6. Take the best selling game of this gen and compare it to the best selling game of the ps/n64 gen to find the difference then divide BOTW numbers with that difference to get pre inflation sales numbers. Decent but not ground breaking
I'm not sure that's how it works.
It's not like with money, and there already were 10m, 20m, 30m and even a 40m seller in the generations beforehand. In fact, I'd say software sales of the top 5th and 6th gen games are a bit disappointing compared to those of the gens before and after those, but that's a different story altogether.