Of course its not dying out, my 21 year old brother is on his third MV! His current is the RL in the restoration forum.
As with everything, things don't stay the same, where my Dad was buying vehicles and parts from local farmers and scrapyards, we're now using ebay and Milweb. Information has never been easier to share, helping restorations and exact paint schemes etc but also everyone has seen the ridiculous prices some MV's are advertised for, and that pushes up the price of the restoration projects, parts and militaria.