It would appear that certain posts highlight a lack of understanding into the qualifications required to check and / or instruct in the simulator. Basically one can be a SFI / SFE ad infinitum subject to certain conditions dependant on the specific role. The animus directed at certain retired members of the star chamber are a different matter. Personally I hope that they rot for their disgraceful and disgusting participation in the 49ers debacle. However, it is possible and quite legitimate to check / train into late old age if the will is there.