Biden won't be able to string two sentences together a year from now, let alone three years.
A year from now??? He cannot do it now.
Many believed that one year ago, including me. I actually don't perceive any deterioration from last year. Maybe it's so slow that we don't notice, but that suggests that he won't be too much worse in 2024. Maybe enough that people in his inner circle will be able to tell, but not enough to affect his carefully managed public appearances.