> Backward Compat? IBM guarantees that your code from the '40s will run today. I hope this is exaggeration, because I don’t think you’ll be running Colossus “c

> Backward Compat? IBM guarantees that your code from the '40s will run today. I hope this is exaggeration, because I don’t think you’ll be running Colossus “code” (from the first programmable digital electronic computer) on your z15 :) Your point still stands. They’re in a different class from x86 machines.