Super Stars doing numbers isn't a new phenomenon, they've always performed well regardless of adidas hype status. Boost does okay at the scale it's being pushed right now, but boost shoes aren't doing numbers. Not a single boost shoe has ever cracked the top 10 list, and yet the hair Jordan 6 was the best selling shoe of Q1 this year. Context is way different inside sneaker themed spaces like Nike talk. I'd be willing to be that alpha bounce does more numbers than any boost model.
Why does Nike need an equivalent though? To keep sneaker heads happy? You have to keep scale and Volume in mind when you think about what a company like Nike does and what a company like adidas does when it comes to innovation and tech. The fact that the superstar is adidas top selling shoe, and that adidas is in competition with sketchers for the distant #2 spot in sneaker maket share should tell you something about what the majority of shoe consumers are buying.
I think a lot of people see this whole adidas vs. Nike thing as a an adidas is taking from Nike thing and that's not really the case in my opinion. Nike is suffering because they've been so invested in basketball shoes crossing over (pun intended) into the casual space and people just aren't buying basket ball shoes like they used too. That's got nothing to do with adidas.
At the end of the day if another brand starts putting out something good, that just means I'm buying more shoes in addition to the shoes I like already. As a consumer, if I already have adidas giving me boost, why do I need it from Nike as well?