While osteoarthritis is not trivial, steroid shots in knees, etc., I sure would not trade with your issues, wow! I have way too many bikes and too much room for them and shelves for parts so have tried countless iterations over the 15 years I have been retired. Where I am at today is most of my current riders have the bar tops level or up to an inch plus below the top of the Selle Anatomicas and am currently in the process of shifting to short drop road bars, 120 to 125mm . My saddle is a bit back of where my last pro fit would have it to help get weight off my hands which helps with the numbing in my left hand. I like just enough weight on my bars to allow for good steering control on less than ideal paths and in the Wyoming winds but insure the fit leaves my elbows slightly bent which helps with the numbing. Here is a shot of an example with the high bars near the saddle height (with a Zimbalde similar to my Anatomica) and the saddle slightly back from my last bike fit but prior to my shifting to shorter drop bars. I have shifted to half finger vibration dampening gloves used by jack hammer operators and rock drillers and for the bars in the first photo am liking a set of Ergon GS1 Evo grips ,although strangely on the opposite bar to their recommendation, and Redshift top grips under the tape.

and Redshift top grips under the bar tape.