One person I follow made a couple good points:
In contrast to the first debate, Trump showed he can be controlled and calm....lest anyone think he's a loose cannon. Nope - He can turn it on and off as fits the situation.
Trump controlled the discussion. Biden was in response mode. The subtle but powerful message is that Trump is powerful and Biden weak.....If you watched the whole debate (I suspect many will just watch the cherry-picked sound bites)
My additional thought: Who was swayed by Biden's schlocky, look in the camera - heart to heart canned routines about common folk struggling with bald tires etc.?? No one.
I really enjoyed his repeated appeals to 1st responders, who resoundingly dislike him. LOL