Did Xbox lose every advantage it had?

[superchunk]

I've seen this thread popup on the hot topics many many times. Each time I see it come up, I think to myself, "what advantages did Xbox ever have?".

Now, this isn't a troll question, even if it seems like it. Seriously though, wtf advantage has an Xbox every had?

Xbox
It was the most powerful of its gen, yet it had a horrible controller and a lack of a library to truly differentiate that power from the others. Thus the potential advantage simply didn't become reality as PS2 had the primary library and of course the massive one-sided marketshare.

X360
It had no technology, controller or library advantage to anyone. PS3 was on-par with everything plus they offset each other in terms of online features. PS3 had free or paid with tons of free content while X360 had cross chat and a few other small items. Both shared 90+% of the same library and the few great exclusives on one sided were easily matched by others on the other side.

Xbone
Seriously. Nothing here. PS4 is more powerful and cheaper. Both offer generally the same experience again.

So I come back to my original question, likely already asked tho, what advantages?