Where is that older thread something like "a case for collecting modern commemoratives"?

Weg

I'm pretty sure it was a thread on the forums where the author spoke of how the mint influenced collecting coins by date and mint since there was design stability. Then went on to how collecting in the future may change from date and mint to design because of the mint changing designs (platinum eagles). He said something in there where many other countries always changes design that collectors in those countries collect by design, unlike America.

One other thing I remember was a couple responces mentioned his liking platinum.

At the end of his post he gave a list of maybe 100 PM type coins recommended to collect.