This is also a sobering reminder: many of the cartridge masters we rely on are getting up there in age - well past the normal "retirement" watermark.
You could point at Ortofon as a model of continuity through multiple master designers, but quite frankly the models from differing eras do not sound alike.
I've also been pointed to a lot of cheap Chinese "knock off" MC cartridges starting to flood the markets over there. These will not be mistaken for a genuine Koetsu, Van den Hul (etc), but it perhaps points to a further shift in the landscape, and I'm not a fan.