As each increment is completed, the percentage of legacy code decreases.

He also defined Characterization Tests to start putting legacy code under test.

So this is largely being pushed by their skill set and legacy code.

This sort of protection, however, cannot be applied to legacy code, and often technical, business, or cultural constraints call for a vulnerable language.

The data included the legacy codes, mathematical approximations of nuclear weapons designs.

This allows a great amount of legacy code to be reused without modification in new applications.

That is, if your work require some legacy code then you will be using a x86 system.

The legacy codes can be used as tools to help design nuclear weapons through computer simulation, and so are valuable on their own.

So you can't argue that there was lots of legacy code in Windows Defender.