Sure, but none of that makes Vance "unelectable."
Yes, Trump has charisma that Vance lacks. But a lot of people really didn't like a lot of the things Trump said -- about immigrants, about women, etc. They bit their tongues and voted for him because he got the things they wanted done, and to a large degree because they are so conditioned by their families, pastors, etc, that they could never not vote for the R. But part of them really didn't like doing it.
Those same people will vote for Vance much more easily.
I posted a sarcastic response because we're sitting here with a POTUS who's been accused of rape about 20 times, charged with felonies almost 100 times, convicted of some of them, been caught lying literally thousands of times, etc, but JD Vance is unelectable?
And if we're honest about it, the Fox News, Joe Rogan, etc machine can probably sell anybody to the horde at this point. You think Republicans aren't going to show up because JD Vance is boring? Nonsense.
Plus, Trump will make it a lot easier on the Republicans by dying well before 2028. "They" will get to sell Vance as an incumbent, a continuation of the good times in a much more wholesome package. Plus, they're going to cheat. Unelectable?? Hell, it'll probably be a Dukakis or Mondale level ass whipping.