Actually you'd be surprised. I had read that at his rallies, between the more charged bits we see on tv, most is really Trump just rambling, at times incoherently, with audience members texting and whatnot on their phones out of boredom. I saw some of this on video.
They have their bad days and good as they get older. Like in Biden's State of the Union this year, he wasn't chewing his tongue off as he often does, was more like he used to be years ago.
I've read Trump was all gone in the head after the election, after the indictments, etc, but then we see him yelling at some rally again and that's all his base needs to go on.
People closer to him going back have said this was not the Trump they know even in 2016. And it isn't the Trump that kissed everyone's ass trying to get chummy with everyone before. He's on a nutty traectory and these MAGAts are on for the ride,,,