I guess not all synth users see it that way. As far as efficiency and features the Korg Legacy collection has a number of advantages over the original hardware. convenience being one of them. Price being another. Good enough for most people. Simple as that.

There are also some minor modifications and added features (like M1 having optional resonant filters and all of the ROM card sets as part of the library etc). Really, more than enough to play with for beginners.

Of course for those of us looking for new and complex synths that are merely based on the original design something like the software M1 is nothing but a joke. Yet I can think of some die hard wavestation programmers who love the Legacy wavestation.
For obvious reasons of convenience and so on.

I'm not too keen on the whole thing to be honest. I'd rather see Korg do what NI have done with FM7. May be some day.