> 3) Edit and Continue C++ in debugger IDE all day on target without ever bothering to stop the game. (Yes, this took some coding discipline to maintain.)

Similar experiences but with Java and Eclipse: editing code while it's running is amazing. And yet, far too often, since moving on from Java to Swift, even with the "proper" Instruments, the actual best I've had has been debug-by-print in much slower cycles... and sometimes not even that, when things went wrong in SwiftUI I might as well have been an ancient Roman haruspex reading entrails for all the good it did.

And at the time, everyone was complaining about Eclipse.