A good analogy is the Swiss mechanical watch. For several hundred years, you could only buy a mechanical watch.
Then in the early seventies, along came the Japanese digital. Very accurate, no need to wind, waterproof - it was a dream, and after a couple of years, prices came down to consumer levels, and everybody could afford one.
Sound familiar??
In the last 10 years however, the mechanical watch is back, and selling like hotcakes. Everybody is making them now, the Swiss, Germans, Japanese, and even the Chinese. It seems that old fashioned values will out, even if people have to pay for them.
The old fashioned mechanical watches from the early part of the last century, which at one time were easily collectible because no one wanted them, are now fetching thousands of pounds.
Don't sell the old Nikon F2/3, Canon F1, Pentax LX et al.............you just never know!!