when you think about how different the world can be and has been in 20 year spans — from peace to unexpected global wars to sweeping depressions and etc…it makes you humble about thinking that the way things are now are the way things are going to be even a bit down the line.
external energy v. personal internal energy , I’d go for the latter.
of course in 20 years, really advanced sex robots will probably be the norm. They’re very loyal, in a way. here’s an important video about sex robots.