Droopystop,
That is always the question. When do you stop modifying the last generation, and start with a clean sheet of paper?
The differences between the generations of helos is like the difference between the same span of automobile technology:
Here is a car developed at the same time as the S-61, and only a few years before the Puma:
Here is the dashboard that the passesngers faced in a crash:
Here is the seat they sat in (find the seat belts!):
I, too, am nostolgic about the past, but I have the exciting knowledge of what the new stuff means, and how it will (already has started) improve things.
The first pilots on the 61 checked me out, they loved it too. I instructed people in it as my first job as a Sikorsky test pilot, and I love it, too.
Forty years from now, people will lament that retirement of the S-92, and a great new Sikorsky team will roll out the S-124. I know I won't be there to see it, dammit!