It is a sunk cost for them. They literally cannot get it back. But for somebody new why should they have to pay this cost if there are many less expensive ways

It is a sunk cost for them. They literally cannot get it back. But for somebody new why should they have to pay this cost if there are many less expensive ways to describe a UI. The lowest common denominator is now invading everything including native. This often happens but it is regrettable.