Linux isn't as good as it gets, but it moves significantly faster than pretty much any other software project. The majority of the code is hardware driver/suppo

Linux isn't as good as it gets, but it moves significantly faster than pretty much any other software project. The majority of the code is hardware driver/support, and it's relatively well understood in terms of performance now. Linux today is not much like Linux 10 years ago. Making something better than Linux in some way isn't hard. Making something consistently and sustainably better in enough ways, at the rate Linux moves, is a very hard task.