Not everyone has that sort of luxury of access to source etc., people want their existing binaries to run faster. Also, if you need to recompile to get a perfo

Not everyone has that sort of luxury of access to source etc., people want their existing binaries to run faster. Also, if you need to recompile to get a performance boost, why not recompile for a cleaner modern architecture? You can always use an emulator for legacy code, if it isn't going to run fast on a modern CPU either way...