School me on re-using a new(ish) camshaft

I have also re-used used lifters that still had crown left them, on a different cam, & no problems. There is also quite a variation on lifter radiuses [ crown ].
Even Mother did it. The original 440 Magnum lifters had a smaller radius than the 440 6 pack lifters, even though the cam duration & lift was for each was the same. The 6 pack cam lobes were also different, 'low taper', to match the larger radius of the matching lifters. This was done to reduce wear because it provided more lobe/lifter contact area for use with the heavier 6 pack v/springs. It seems to be an idea that has fallen away from favour....