Overall, I am wondering why the EU is picking on HTTP/HTML support alone and not requiring Microsoft to offer choices on alternate desktop shells, file systems, etc...
they can't just ignore the law in a country they are operating in, especially when it's the world's biggest economy, which could just seize the assets owed without issue.
There really was nothing for them to gain by removing this dialog so I don't think it was done with profit in mind. Their own browser is now a pretty compliant browser so it doesn't slow down web adoption.
I can't really believe it was dropped by accident as all jokes aside, very few companies test their software as thoroughly as Microsoft.
But watching MSFT fragment themselves endlessly over the last two-decades, I Think this is all about "focus".
Every successful entrepreneur talks about "focus" and not being pulled in a million directions, mastering your domain and relentlessly pursuing it.
There are only so many great leaders in an organization that can manage these types of "obvious" potential failures, and corporate memory is notoriously terrible as teams and employees turn over.