Concerning domes & shingles, every dome owner I have ever met had problems with leaks at angles and/or around dormers. I just like the space efficiency. Might be useful in my future L-5 home in space.

Skylights? Same problems, mostly due to workmanship, a roofer friend says.

Concerning batteries, about 10 years ago I started reading some research blips about novel battery chemistry and structures. It was in Science, a reputable source of research pubs. Subsequently I have seen some R&D on the production side of novel batteries. I had hoped they would be widely marketed by now. ... when I need them! I have to admit that my knowledge of physical chemistry was inadequate to the research papers, but I understood the pretty pictures! My subscription lapsed a few years ago so what little I was aware of has probably been superseded.

I don't want to be on the bleeding edge of new tech. A friend (and flight instructor) told me "Never fly in the 'A'" model. Go for the "C". Good point.