This is absolute peak cope.
Go back to 1992 and look at Biden. Then look at him on any day in 2018-2020. He's an absolute trainwreck. It's a foregone conclusion no one is actually voting for Biden. They are simply voting because 3 weeks after the election if Biden wins he'll be declared mentally unfit for presidency by the senate and President Kamala will reign.
Well doah. But the reality is use it or lose it and you average person is not immersed in intense work to lose less than they might have retained otherwise.
My dad was an engineer, he liked working, he retired at 65. But then he took on a law degree, then people asked him to run for the senate (not US), he always had a book on maths or physics, always golfing (walking the course not like fat Donny) and the year he passed took on another course in electronics.
At 83 he could still handle any problem thrown at him though he himself complained of reduced mental function his immense experience carried him through. Biden has this, he may not have a mastery of the near whole facts like a younger man but he does have a mastery of people who do.
Trump rules by fear and reality TV rules, Biden more by co-operation. Both have advantages and disadvantaged but I can say for certain, faced with two declining minds, I'll pick the guy who can pick good people the first time and listen to them every time. Trump eventually gets a person who survives the hunger games but.. his wins are mostly Phyrric victories for America.
Biden with good rest and exercise is able to wield his experience and influence / contacts well. Donny spends half the day in bed, does not exercise and is getting worse.