I am very confused. The author of the article writes that svbtle could have been the next tumblr. It's like saying my clean design html could have been the futu

I am very confused. The author of the article writes that svbtle could have been the next tumblr. It's like saying my clean design html could have been the future facebook. I think svbtle has a clean design and a good interface, nothign more. If my instincts here are wrong, then I have to question my understanding and all the IT experience I have. I might be missing a big part of this svbtle and obtvse controversy.