You answered the question yourself: There is already a standard that allows anyone to create software that works cross-platform: the browser.
I too wish that software would be efficient, robust and long-lasting. But it seems that most people don't care about this enough (compared to other factors) to force change. (Alternatively, they are locked in to platforms they don't like to use.)
Which one exactly ? IE ? Dillo ? Lynx ? Pale Moon ? Firefox version 126 ?