When he was a candidate, Trump attempted to vilify Joe Biden as a "Sleepy Joe" who hid in his basement from the pandemic. He was ridiculed for wearing a mask and was criticized as both corrupt and incompetent for failing to get anything accomplished during three decades of public service. Now he's President Joe, and has an average 56% approval rating. He's actually on the verge of hammering out a bipartisan infrastructure deal, something he never could have accomplished without his decades of experience.
You might recall that Trump was supposed to do this in his first term. He actually campaigned on that issue. He explained his expertise: "I own buildings. I'm a builder; I know how to build. Nobody can build like I can build. Nobody. And the builders in New York will tell you that. I build the best product. And my name helps a lot." He did announce a $1.5 trillion plan in 2018, but walked away instead of compromising like Biden did.
Biden is an adult.