> Between email and lisp, is there any other system that you can find in any sufficiently large system? Make. How many systems try really really hard to just

> Between email and lisp, is there any other system that you can find in any sufficiently large system? Make. How many systems try really really hard to just update the things that need to be changed in an output store from a different input store using a serial number? Nah, just use the date. That's almost like a serial number, isn't it? Except for those handful of things for which we couldn't be bothered to set up the dependencies correctly - those get updated every time. It won't be that expensive to refresh just a handful every run...