I have an American based friend who recently visited and I discussed this with him.

His house has an asphalt shingle roof, which is beyond common, it’s standard where he is.
This means the roof supports are light, and won’t tolerate the load of solar panels (direct weight maybe, but not torque from wind).
Beyond that, his states power company have limited the accredited installers to a group that refuse to sell panels, they effectively lease them to you, with an insane payoff period.
If you go independent, you can’t tie into the grid.
He’s subject to a HOA, which means he can’t build anything in his yard without approval.

And so, whilst he’s paid for his dad here in Adelaide to have panels on his roof as a no brainer, he’s given up in the US.