Should we be operating 45 year old aircraft ?
The reality is that if the thing has a C of A, an MR, and a AD and SB-driven maintenance system, then .... only CASA and the insurance company can stop us !
I knew a lot of seaplane operators that self insured, as getting any sort of insurance for floating planes was attracting 20%+ hull value premiums. Only the governing bodies can ground a type or make it hard enough to operate one to effectively ground them.
Grounding any type will put huge financial strains on operators and manufacturers if it's a new type, and should never be done just because of a crash, unless it's obvious the type is at fault. Boeing is only getting away with its 737 problems because it's huge, the Airvan was made by a tiny company with that being it's flagship, there's almost no comeback from that. In the case of the C210, if it does look like another wing has come loose prematurely it surely should warrant a grounding and inspection at a minimum.