I've said this before, but:
At 84 (in 2 weeks) , my wife and my primary exercise is hoisting up a half hour of shots at the local NYC playground, most days
(I'll take some pictures)
Mei is only 71, but has developed a fine 2-handed set shot.
I shoot 10 minutes of layups...the choreography is great for balance, then 6 or 8 under the basket reverses (great for my super stiff neck) and finish with 15-20-foot running one-handers (my jump shot is long gone) but I prefer to move while I shoot better than standing still.
It doesn't seem particularly unusual to me that we still do this...and my form and and wind haven't change much in the last 15 years...Folks have mentioned that we should find somewhere to compete...but I haven't found an over 80 team or league.
I'll let you know when that changes...as it must.