So in the next 10-20 years we wont have any significant advances in detection technology or methodologies? Even if, for arguments sake, the aircraft is at the

So in the next 10-20 years we wont have any significant advances in detection technology or methodologies? Even if, for arguments sake, the aircraft is at the moment leaps and bounds ahead of the nearest peer competitor military there is going to be limit to how effective a new coat of paint will be for the B-21 in 10 years time. To get your monies worth from this thing you'd want a lot greater effective service life than that and without stealth the B-21 would have dramatically diminished it's dollar to effectiveness ratio.