There is one more thing. Developing in HTML5/JS (with all its ecosystem) is freaking fast in terms of developer productivity. You will probably build full fledge app in shorter time using JS than with C++. So you can deliver MVP to the market faster = profit $$$

And initial group of users are early adaptors anyway. They are usually eager to try new applications even if they are not perfect.

The problem is: "what next?", when users will start complaining about speed or other things.

Should company rewrite original HTML5 based MVP to C++ to gain speed?

Or should they optimize existing HTML5 solution? (many HTML5 apps are running with nearly native responsiveness).

Or something else? Or maybe HTML5 even for MVP is a bad idea?