The C210A and and all C210s before the C210G have struts. When the 210s became strutless and there were a number of accidents where a wing was lost Hangar Rat engineers without ever leaving the bar quickly came up with the conclusion that strutless C210 wings were not as strong as the older ones with struts.
Real Engineers after carefully collating ALL the information discovered that actually the strutless wings are stronger than the C210 wings with struts.
The problem turned out to be that the strutless models are cleaner with respect to drag and when things start to go pear shaped less time elapsed before the aircraft was beyond VNE.
This meant the pilot had less time to sort out whatever was going on in the cockpit before disaster struck.
A lot of attention was given to higher proficiency in instrument flying as well as recommending dumping the gear before thing got out of hand.
The number of accidents decreased but it seems that some of the old knowledge is not being passed on to the next generation of pilots.