That's because the browser is a de-facto OS, which occurred only due to a sheer lack of actual OS market innovation - Debian had a package manager 20 years ago,

That's because the browser is a de-facto OS, which occurred only due to a sheer lack of actual OS market innovation - Debian had a package manager 20 years ago, Windows didn't until 2019. Browsers succeeded because apps ("websites") abstracted away the download/install process in a user friendly fashion. That ruling's only fault was that it didn't go far enough in hammering Microsoft's anticompetitive "moat" practices.