Yes, I agree. Trump is older than Biden was in the previous elections, and the GOP tried playing the old card last time as well. Trump just doesn't look that old, compared to Biden. Biden looks like an old man that can sometimes barely move, talks relatively slowly, looks like he nods off, and worst of all has weird gaffs like mixing up the president of Egypt the president of Mexico. When Trump has similar things happening to him, you just kind of expect it from him because he's ignorant.
Friends of mine, that vote D, have told me that Biden is basically "full of drugs" that hold him together. I don't think that's true, but the sentiment is there. A lot of people vote Biden, even though they do kind of think that he gets confused, and he says weird things sometimes. I agree that it's the team that counts, more than just the person.
Rationally, I don't see why anyone who would've voted for the Democratic party with a different candidate would vote for the GOP now. They are completely different parties with completely different values. However, those on who would've voted for a different candidate might decide not to vote at all, which is also pretty bad in elections that will probably decided by a some tens of thousands of voters in swing states. People aren't always rational.
I don't think that Biden had any real baggage. The Hunter Biden stuff was the best thing Fox or whatever could bring up, and it was pretty dumb. I don't think that so-called swing voters took it seriously. His old age was the only thing going against him, even in the previous elections. He was a relatively safe bet, with tons of experience. I just think that the age issue is big enough now, with increased visibility of gaffs, and I think that it affects more voters than it did in the previous election.