a serious OS doesn't break backwards compatibility on an individual developer's whim, no matter how famous they are. Well, most people seem to like their OS a

a serious OS doesn't break backwards compatibility on an individual developer's whim, no matter how famous they are. Well, most people seem to like their OS a little bit less serious nowadays. Or, more seriously, over here in the real world this is simply a non-issue for almost everybody. Binary compatibility between OS revisions was important when compile-runs would take days. Nowadays you just compile for your target platform and move on.