[baal80spam]

> If my program has many windows open which big X should close the program?

The last one, obviously.

> Why shouldn't I be able to run a program without any windows open?

Because 99% of the time window IS a program. If a program has no windows, it is a process.

[cmiller1]

Why should a process and a program be different things? Sounds like an additional abstraction to me