For the time being, Mr. Macron is benefiting from a kind of honeymoon period. Many French are basking in the new sense of optimism he has ushered in, and a latent desire for their country to get unstuck, after years of relative economic and political malaise. Enough people are sufficiently discouraged by the status quo that they are willing to try something new.

“There is a sort of change in the culture,” said Marc Abélès, a professor of political anthropology at the academic institution École Des Hautes Études en Sciences Sociales.

“There was an atmosphere that was a bit deadening, the impression that one couldn’t get out, that one was cornered,” he said. “And I think against that backdrop something was pushed. We were completely looking at things negatively, and now people have a tendency to see things more positively.”

But others say that once the impact of Mr. Macron’s changes is understood, at least some segments of the population may actively resist him. That presents a lurking danger to his ability to succeed, said Jean Garrigues, a historian at the University of Orleans. Because those opposed to him lack much representation in Parliament, they may take to the streets, he said.

Nonetheless, there is a sense that Mr. Macron brings a breath of fresh air.

“He’s completely upended the landscape, and the thing one admires in him is his guts,” said Maurice Billet, a retired executive, as he purchased the first of the summer peaches at the Thouaré-Sur-Loire market. “The people are tired of half solutions.”

Noura Moreau, 45, who runs a restaurant and also serves as an assistant mayor in a neighboring town, was enthusiastic enough to join the campaign of the local République en Marche candidate, Sarah El Haïry, 28.