Being an introvert, I always used to be exhausted at the end of the work week. I liked my coworkers a lot, and I liked spending time around them, but it didn't matter, I'd still feel wrung out at the end of the day. And by the end of the week, each day's exhaustion would have accumulated to the point where I needed two days spent doing absolutely nothing just to feel right again.
Going for a weekend trip? Impossible, I barely want to shop for groceries. Hanging out with friends? Not going to happen, I talk to people all day at work. The weekend didn't feel like a vacation, it felt like a time to catch my breath, and nothing more than that.
Since WFH, I don't run my batteries down during the week, and suddenly I have all this energy on Saturday and Sunday. I've taken up new hobbies, I visit places, I catch up with friends, I exercise, I go to restaurants. I've done more interesting stuff in the last 4 years than in the previous 10, because suddenly I have usable time and available energy. I thought I was a homebody, turns out I'm not. Imagine not finding that out for the first 20 years of your career! I'm not going back to the office, that's for sure.