Every other 64.5 yr old I have ever flown with has been deaf, burnt out, and/or bordering an alzheimers diagnosis. You might be cognitively great but you won the lottery. Go spend your money and enjoy life. If we let this new completely arbitrary age surpass the old arbitrary age we are opening a can of worms with our medicals and scrutiny. There's this whole big thing outside of flying that is pretty awesome.