Not on cloudy days or in many places for much of winter. And winter is when the power is needed most
True, solar panels work best in full sunlight, but even sub-optimal performance is pretty much free power.
Heating is energy expensive. Most panel equipped houses have alternate heating, in fact, most are still connected to the grid/mains.
And in many places the wind doesn't blow enough to ever make them practical.
And yet they are. They provide cheaper power than fossil fuel generation in many places.
They're not put up haphazardly, they're erected in areas of almost continuous wind. If the wind dies in one place, power is shunted to its market from other wind or solar farms perhaps a thousand Km away.
People have been talking about these for decades and they still have very limited implementation. It might be because they are economically not viable. On the other hand nuclear power doesn't have these limitations.
No. The whole industry has been taking off like a rocket. Sustainable sources are going up all over. Efficiency is up, costs are down.
That's not to say nuclear doesn't have its place, but it has its drawbacks. It's not a perfect solution by any means.