Short changed is putting it mildly. Despite the advantages captive elephants generally live drastically shorter lives and alot of it while in pain.
Who makes the decision that enrichment performs up to its task? Is it suppose to supplement an animals daily activity or is suppose to cover up deficiencies of the zoo environment? Is it becoming an industry within an industry. Didn't we all get the same self serving pap when exotics like gorillas were supposedly better off hand raised in prams and cribs and shuttled off to other places as needed instead of maintaining natural family groups? I suspect very intelligent mammals who spend half their day foraging and who have large complex kinship groups need a little more than an easter egg hunt for scattered food.
About age, I did not mean to make a blanket statement. My initial post was to address a remark about gorillas, orangutans and elephants living the highlife when these are the problem animals in captivity. There is a denial about shorter lifespan of captive elephants and possibly of the orangutan and gorillas. I think self interest may be at work when experts make categorical statements about orangutan - lifespan in the wild is supposedly still hard to estimate or not known. Orcas and dolphins(some species?) are also notorious for having much shorter lives in captivity.
There is a curious distinction between more scholarly sources and more common sources. The more scholarly sources will give longer lifespans for animals while infotainment and zoo websites will cite the lower end.
Orangutan
link says lifespan 50-60 yrs in the wild.
The quality of life elephants, gorillas and orangs in captivity its a depressing situation even in better zoos. All three animals are typically overweight. Drugs and surgery are necessary to fix man made ailments. Elephants commonly get painkillers and steroids for hard floor surfaces. Orangutans get air sacculitis from inhaling their feces because of lack of climbing opportunities which may require surgery. Elephants and gorillas are infertile in captivity(
one third of gorillas in captivity) because of abnormal hormonal levels and fertility drugs may be used. Feces eating and vomit reingestion are problems with gorillas and orangutans. Prozac have been used for all three animals for abnormal behaviours.