Technical debt has a cost. Raymond Chen has countless blog posts about what it takes keeping backwards compatibility working. For example, an update to some par

Technical debt has a cost. Raymond Chen has countless blog posts about what it takes keeping backwards compatibility working. For example, an update to some part that should not break anything actually ends up breaking an app because the developers decided to monkey patch based on a match of a byte string or whatever that ended up changed. The only reason WINE works is because of a massive community effort to reimplement those bugs that Windows is forced to keep.