So many people I know are doing stuff, like joining a pickup soccer league, rock climbing, board gaming, video gaming, gardening, surfing, knitting, hacking, making, etc. All of these interests come with their own new circle of friends you meet, who I then meet through knowing you when you invite your soccer team to your birthday party. People will keep up these things even when they have kids.
My parents generation never seemed to do any of this. They were contented with basically not socializing or engaging much beyond what they already knew, never taking personal trips or even eating out even though they can afford it, just staying busy with the house making tasks for themselves, since there is really no limit of potential repairs or projects to do around a house if you don't limit yourself (e.g. you don't need to polish the floors that many times a year). In my generation it seems like everyone has something they are really into that isn't work or their immediate family. You see this starting to shift how these suburban towns you grew up in look like, too. Main street suburbia is no longer dead antique shops. There's now an arthouse cinema, axe throwing, duck pin bowling, and a brewery.