Maybe for Square Enix, but the old Square was able to do it. They pumped out 3 mainline FFs for the PS1 as well as re-releasing 4-6 on the console and were still able to release another mainline FF in only the 2nd year of the PS2 gen + an MMO FF in the 3rd year.
That was some sublime management right there, kind of sad that Square Enix lost that rhythm, otherwise we would've gotten Final Fantasy XXVII in 2027, like Deus Ex Human Revolution predicted.
My bet with The_Liquid_Laser: I think the Switch won't surpass the PS2 as the best selling system of all time. If it does, I'll play a game of a list that The_Liquid_Laser will provide, I will have to play it for 50 hours or complete it, whatever comes first.