In the period they mention, I've gone from heavy socializing to nearly none. It's a lot of reasons. My kids are grown. My need for new customers is sharply low

In the period they mention, I've gone from heavy socializing to nearly none. It's a lot of reasons. My kids are grown. My need for new customers is sharply lower. I've decoupled my self-esteem from societal expectations. This killed the carrot for a lot of my social behavior - like the need for small talk. My resistance to things fades with age. Like the ever increasing heat. My tolerance of traffic. My tolerance of crowds - especially when it's enhanced by cluelessness (eg:conversations in choke points). Plus I live with my 5 adult sons (thanks 4-income economy!) and we get on well.