I think that quality matters even in 'short lived webcrap and appcrap' - you only get one chance to convince your customers to trust you, and if your application even so much as behaves subtly wrong they're gone. I think that's the class of error that 'hack it out' most causes - it's not an application error, it's an error of logic or off-by-one or floating-point-math-where-it-should-be-exact.
