r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.
I am more interested in the variety of those happy, fulfilled lives than the number of them. Mere duplication has no value. The value I attach to any of these scenarios is not a function of just the set of utilities of the individuals living in them. The richer the technology, the more variety is possible. Look at the range of options available to a well-off person today, compared with 100 years ago, or 1000.