.. as/400 programmers range in the 40-70 year old range
I agree with that. In fact im an AS/400 programmers (and an OS/400 sec officer too) and i fit in that range

BTW, OS/400 is an amazing O.S. on an amazing machine. However, it CAN be hacked (i dont know any virus although) just using technics applied to other platforms: administrator stupidity. Most AS/400 around the world are bad administrated and can be easly hacked thru the network with 10 min effort. Just because some ppl cant read the damn manuals..