Granted, as a professional loser I'd like to find someone that likes cycling too, though cycling alone is great too - still, I'd rather find that person in one of those rides than in some weird thing like Strava fly-by's or something.
On Zwift your followers can be automatically notified when you start a ride, and you have zero control over them receiving that notification.
It's creepy how much they push the social aspect.
I've found that it's really what you make of it. My city has a bunch of cycling subcultures - social slow rolls, fast road riding, sightseeing and exploration, commuting and errand-running - and different people like to see and talk about different types of rides and sometimes dabble in different subcultures, but generally people care way more about seeing the rides, and whatever fun banter or background context you add when you post it, than analyzing your speed and elevation.
I really love the social aspect of Strava because I'm friends with all the other people I follow on it. In some way I think it is more intimate than traditional social media. You could get a better picture of my life and how I spend my time from seeing my physical displacements during the day than by seeing the super filtered Instagram stuff that I only choose to share when I'm having a good time and doing something interesting.
Also the watch reminds you to move from time to time.
Komoot is great for planning of "trips" and "stealing" other people's routes. I've done couple of them and you kind of never know what you're gonna see there (hopefully not agressive dogs), all of them were pretty enjoyable. It has a bit of a social aspect, but barely anyone uses it where I live, so IDK how it is.
One thing I miss from Strava are segments (or whatever they're called) - short parts of your route with it's own leader-board. Has "speedrun, but IRL" vibes, which is pretty cool IMO.
It also has a great route builder.