1. It looks years for gmail to copy boomerang 2. Gmail has no desktop app. It's reasonably fast, but not as fast as Superhuman. 3. Superhuman is a niche app,

1. It looks years for gmail to copy boomerang 2. Gmail has no desktop app. It's reasonably fast, but not as fast as Superhuman. 3. Superhuman is a niche app, gmail caters to everyone. They can't reorient gmail around a tiny, high revenue portion of users 4. Gmail's iphone/ios apps lack the vast majority of desktop gmail's customizability features The competitor to Superhuman would be a similar niche app, not gmail itself.