Microsoft, during last 20 years, had many APIs that were the future. They were deprecated slightly later. The licenses won't expire; the support will stop. UWP

Microsoft, during last 20 years, had many APIs that were the future. They were deprecated slightly later. The licenses won't expire; the support will stop. UWP is not automatic successor, many apps are on Windows because of Win32 and that nobody wants to rewrite decades worth of code. Kill that and you kill Windows.