Presumably the loaf of bread you bought did everything that it was supposed to when you bought it (and without bugs, or else hopefully you'd throw it away).

Software is almost never bug-free when released, and increasingly isn't feature-complete. I don't think it's crazy to be wary of using software which isn't being actively developed. It will certainly depend on what it does, and whether or not what it doesn't do (or what bugs it has) are livable.