What's not explained is the difference between this latest miracle machine called ECMO and the plain old heart–lung machines (aka cardiopulmonary bypass or CPB)

What's not explained is the difference between this latest miracle machine called ECMO and the plain old heart–lung machines (aka cardiopulmonary bypass or CPB) which I'm confident that most people have heard of. Note that heart–lung machines oxygenate blood just like ECMO. As far as I can tell, heart–lung machines are used only during surgery whereas ECMO seems to serve exactly the same function but comes in self-contained packaging so it can be used longer term outside of surgery. Could someone with more domain knowledge tell us if ECMO really is an entirely new paradigm like the article claims?