I'll tackle this part, since no one has.
Imagine no longer needing to wake up at a certain time and being able to schedule every day as you please. You could play golf all day, every day or hang out with friends for lunch all the time. This life sounds amazing if you can make it work
Yes, this DOES sound amazing. Are there any drawbacks?
but those who don't proactively set it up often end up sitting at home.
Actually, that sounds pretty good to me too. I spend little awake time at home as it is. Some more would be very nice. You know, like a never ending weekend.
If all your friends are still working full time, they may be too busy to meet up on a regular basis
So I should keep working full time so that I'm also too busy to meet up with anyone on a regular basis?
and it could take a considerable amount of effort to meet new friends.
Great. I'll have all the time in the world to work on that. What I already don't have now, as a working stiff, is the time or energy to make new friends. How would having more time or energy make that harder?
The lack of daily activities can be depressing for those who lack the initiative to set up regular social events.
If I get so depressed by being outside, setting my own schedule, and not being locked inside in a cubicle all day then by George, I can solve that problem too! I'll go back to work! But of course, then I'll be saving too much for retirement again. Hmmmm, quite the paradox here...