Thoughts:
1. I believe just about everybody has already made up their mind for who they'll vote for. It ain't like most of us are unaware of who/what they're getting with either person and I don't think any debates are going to substantially change anything. If they do have one, I will not watch it because it'll be too painful and embarrassing that these two people are the best we can do to become the next president. Senile old man vs total asshat, what a choice.
2. Trump is an overbearing jerk and will come across as bullying an old man. Female voters don't like that, just like last time.
3. I think there's a fairly good chance that Biden drops out at some point, citing health reasons. I've been saying that for 2 years though.