The reality is you only lose contact with people who don’t matter enough anymore. When I left around 15 years ago I reached out to those I wanted to keep in touch with and made sure I had their number. Anyone else if they looked hard enough could find me elsewhere if they wanted, or already had means to contact me directly. Most did not.

But guess what? My relationships with people are deeper. It’s been wildly positive for me. The only issue I had at the time was missing out on events from acquaintances, but that’s not an issue anymore with alternative apps