Responsible software should have a released branch that has only bug fixes, and then other versions for new features. Otherwise, how the fark can one use your software for certified products? How can someone do a risk analysis on something as a platform, when it might change daily? Feature changes should not be casually thrown in. Yes, mozilla stupidly did this - but most software does not, and should not. Fortunately in the case of Firefox, it's not used as a /platform/, it's used as a client, so as long as the previous features still work the same it's not as big of a deal. Something as core as the OS itself though? Do you really want device manufacturers to stop using your product? Yes we get it - hire the cheapest (h1b) workers you can, and reduce down to having a single branch - since what made you a massive company seems to not be something you want to do anymore, and you'd prefer to act like a tiny hole in the wall shop.