Edit: I failed to include Jason's quote about Biden. My comments are to Jason, not Industrialsize.
You are not the first person that has given a very bleak report of Biden's failing health. What are the signs that you have seen of Biden's early signs of dementia?
I don't see any difference in the Biden of 2021 and the Biden of 1991. Biden's voice is not that of a great orator. But this is not new. Biden's speaking voice has always been a bit weak. However, a person's voice has no bearing on a person's mental ability.
As far as the US pulling out of Afghanistan, I'll wait until the first week in September to make an assessment of that withdrawal.
A lot depends on the Taliban. The Taliban may cooperate with the US because it is easier for the Taliban to allow several thousand local American allies there slip out of the country than try to round them up and then killing them after fake trials.
Biden may not be the first choice of president for many people in and out of the us. However, Biden for sure is a much, much better person to be US president that Donald Trump!