Re: I don't know how
We didn't replace mainframes with what we now call "standard" or "legacy" x86 applications. We won't be replacing standard x86 applications with public cloud computing.
Public cloud computing is an and technology. Not an or. But it is as significant an "and" as x86 was to mainframes. Very soon now, most new development will be on public clouds. But 40 years from now, we'll still be dragging these x86 applications along, too. Because we jsut have too much invested in them to throw them away.
That's business. And it has little to do with technology, no matter how much technology it uses to accomplish it's goals.