"break it into business logic and UI and find partner or hire developer who love to develop native UIs for other OS"
As I said in my previous comment, this is quite expensive, and people inside Silicon Valley rarely understand how cash-strapped the software sector in the rest of the world is. In Czech, we have a saying "a person who is fed won't believe a hungry one" and SV veterans that are used to reams of VC cash supporting even lossy businesses like Uber have no idea that the excess spending needed to hire another developer for several months somewhere in Warsaw or Bucharest may kill a fledgling or small company.
As I said in my previous comment, this is quite expensive, and people inside Silicon Valley rarely understand how cash-strapped the software sector in the rest of the world is. In Czech, we have a saying "a person who is fed won't believe a hungry one" and SV veterans that are used to reams of VC cash supporting even lossy businesses like Uber have no idea that the excess spending needed to hire another developer for several months somewhere in Warsaw or Bucharest may kill a fledgling or small company.
In this, the unity of the Web is a life-saver.