I would have to say that the biggest single change is the rise and proliferation of artisan pipe carvers. 50 years ago, the scene was dominated by factory makers and it was primarily the meerschaum market that followed individual carvers.
Also, there wsn't much of an "estate" pipe market. They were just used pipes and didn't sell for much.
Also, there wsn't much of an "estate" pipe market. They were just used pipes and didn't sell for much.