>I've been gainfully employed in industry for ~2 decades

For someone with that amount of history, it will not matter.

But for new people: Just keep a generic linkedin that looks professional (you dont have to use it, just have a profile). It's going to look sus to have zero social presence; might as well give HR something to chew on. Don't add your managers or bosses on your personal social accounts.

You're better off having some generic stuff up when someone google's your name than nothing at all or worse- some embarrassing shit you posted 10 years ago.