I have a probably 30 year old Troll MK7 harness , been stored well for what I guess would be 30 years and used for very occasional top roping throughout that time. It has the absolute comedy design feature of velcro on the waist band where you velcro it up and then do up the doubled back buckle up - which means that when you weight it for the first time there is this terrible ripping sound as the velcro shifts and you have time to think "did I do the buckle up...".
But anyhow - does anyone have the capability and inclination to test it to destruction ? The belay loop looks solid and the waist belt looks like you could hang a tank off of it.
I would happily send it to someone if they had the means, in the interests of science, of course...