> Give me any ethereum use-case & I'll tell you how to do it with bitcoin

That's like saying give me any HTTP use-case, and I'll tell you how to do it with Gopher. To me Rootstock is like putting the WWW on top of Gopher. You can do it, but why?

"We don't need GUIs, command lines can do everything!"

"We don't need Java/Python/Ruby, you can do it all in C!"

"We don't need C, you can do it all Assembly!"

Ease of development and implementation really matter. If I can accomplish creating my block chain app on Ethereum in a fraction of the time and complexity of the same thing on Bitcoin, I'd have to have an extremely compelling reason to choose Bitcoin instead.