[currymj]

i don't think the car analogy is good because cars are expensive to build and maintain, usually are used more than once, and it's very bad if they crash. these properties are true of some software but not the kind of software i'm talking about.

maybe a better analogy would be if you travel to new cities a lot, and have to navigate, you don't want to memorize a map of all the city streets and learn in detail the transit schedules on each rail and bus line, you just care about a few routes a few times. and Google Maps can make your life a lot easier. on the other hand if you lived in that city, it would quickly become pointless to take out your phone all the time to plan a commute to work.