Well, this is sad, even for somebody who's never resonated with the M77 (bolt handle, and soft barrels).
I do think highly of the .375 and .416 Ruger cartridges, and hope they do not die off.
I had a gun show table neighbor recently, an Olde Duffer, who opined mightily that the younger generation is not interested in wood-stocked rifles. After tabling at some five shows this year, I think he had a point. The gun culture has moved away from a Rifleman's ethos.
I recall reading Cooper's Corner in the late 1980s where he recommended the Krag rifle as a pleasing historical and mechanical artifact for a young man, so I snapped one up at a show and enjoyed it. I doubt that such would happen today.
At a recent show there was down the aisle a gorgeous Venezuelan DWM M98 carbine in 7x57 for a mere $625. Nobody <40 years old even glanced at it. I nearly bought it, but I didn't quite want a new caliber (excellent though the 7x57), and took home a Steyr Chilean Modelo 1912-61 in .308.
Nobody but me looked at that one, either. Sign of the times....
