You're right that it's possible to get really, really close, but the effort required is very large and best avoided if possible. Not to mention, there will alw

You're right that it's possible to get really, really close, but the effort required is very large and best avoided if possible. Not to mention, there will always be subtle differences between your UX and native, and it sucks to be in a position where you have to defend that difference to, say, your CEO who's asking why "it just feels different." Or worse, he can put his finger on exactly why it feels different and it's some tiny glitch that's out of your control but ruins the "polish" of the app in his opinion. It puts you in the position of either busting your ass to achieve the impossible or defending mediocrity.