This makes intuitive sense but I'd love research into quantifying to what extent the explanation is "better sleep makes loneliness more subjectively tolerable (because better sleep makes you more emotionally resilient to all hardships, which seems obvious to me from experience)" versus to what extent it's more indirect: "better sleep makes you more competent in general, including at accomplishing tasks that will lead to objectively being less alone (eg, you're less tired and more willing to try going out to an event)"

Hypothesis: if sleep fraction tends towards 1, then loneliness factor tends towards 0.

Rationale: You can't be lonely if you're in a continuous coma!

In other words, loneliness MAY just correlate inversely with the amount of time spent conscious!

So when I hypersleep 18 hours and don't feel Lonely because I have peaceful Oblivion, that's cuz of Science and shit?

Hell yeah, borther!