Eli5 why does the US still use a bomber from the 1950s when they have built two newer ones since then?

Question

Eli5 why does the US still use a bomber from the 1950s when they have built two newer ones since then?

In: 7

Answer 1

If you start with duplo Legos, you can continue buying more, thousands more. You could custom make 3D printed new ones now too. So in theory, you can make any large design item out of duplo Legos. You cantreally connect to big kid Legos, but you don’t need to because the big things you want to make are large enough the duplo size doesn’t make a difference. And from afar, the pics of the duplos 8ft away are the same as the pics of the smaller ones 4ft away. And you’ve invested in thousands of Duplos.
Changing airframes is like changing from duplos to smaller Legos. It is very expensive. As long as you can build the things you want with duplos, there’s no reason to change.