What in Twitter's past makes you believe that b/c they are making this decision that it must be the right one? What decisions in their past instills this confid

What in Twitter's past makes you believe that b/c they are making this decision that it must be the right one? What decisions in their past instills this confidence? I think Twitter is just failing hard right now and the shit has hit in the fan with investors. They are now on the "let's focus on our core product" phase of failing and hey, maybe it'll work, but that doesn't mean Vine is worthless.