My BIL who is an Astra Zen guy said (a Anavex Shareholder also) that Dr's are awaiting a new drug in those areas and it will need to get to the Pharmacy's only. It will sell itself in his opinion.
[A bigger question might be, how will WW society deal with old people who are supposed to be dead by now.]
I pondered that a while back and decided while people living longer and healthier might pose some unique problems, sick old people offer society little.