Xbox created Xbox Live, widely considered the best of console makers in the online front. It sucks that Xbox revolutionized paid online subscriptions for gaming, but at least a lot of other things were positive.
Xbox created Game Pass, widely considered one of the best deals in gaming.
Xbox either created or at least perfected asymmetric dual analog controllers.
Xbox has been fantastic with backwards compatibility for generations of gaming, with the first few years of Xbox One being the only exception.
It seems Xbox has been necessary for the industry. Are they anymore? For services and software, yeah. Hardware? No.
Lifetime Sales Predictions
Switch: 161 million (was 73 million, then 96 million, then 113 million, then 125 million, then 144 million, then 151 million, then 156 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 48 million (was 60 million, then 67 million, then 57 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima