At 63 I think you are pretty lucky to have been ok till now.
I started with P about 5 years ago, (62 now), and still drive, and fly, so if a light aircraft is wobbling your way, hide under the table.
The meds have been very good for me, but are showing signs of 'wearing off', and some dyskenesis has started. You probably know that you have to inform your insurers and the dvla. All I can say is, Keep on rockin!