Actually domes are increasingly efficient, and there is no wasted space. Also they are almost indestructible in a tornado or hurricane, as the wind just zips right over the shape.
And a bif one is yo don’t need surround sound for movie watching.
Rather inconveniently shaped attics at the least I’d think.
Any shape envelope can be made (energy) efficient given time and/or money. However, other considerations must take account, too. As far as space goes, I doubt that a sphere can ever be as effective for living space as thoughtful conventional housing. One might appreciate the ‘spaciousness’ of the dome and consider that a wise use of space but a waste is still a waste - even in homes with vaulted ceilings. I used to think a dome would be cool back in my Buckey Fuller days, but practicality has been brought home to me too many times to follow those dreams anymore.
However, to each his/her own.
Tornados destroy structures by reducing the atmospheric pressure outside, thus the air inside expanding outward explodes the house. Doesn’t matter what its shape is.