There are going to be serious issues even if we transition to solar right now, because it costs more energy to build a solar panel using today's technology that will be realized by said solar panel in it's lifetime.
No, that's not true.
Energy payback time is less than 2 years for european panels. For chinese panels a little bit more.
It is very likely that solar panel efficiencies will continue to improve. Along with other energy technologies.
I believe global cheap electricity is coming soon.