I wonder if the graph changed significantly since covid. I have a friend in his mid 60s for whom texting with friends is his only contact with people since his relationship with his girlfriend ended two years ago. He hardly leaves his apartment, and rarely speaks on the phone.
Does your friend think that his style of life is fine, or does he wish for something different? An older relative of mine is alone almost 24/7, every day of the week, and is very lonely.