I wonder what, if anything, will replace dating apps. As someone who tried dating apps for a while, I never had much luck with them. I ended up meeting my wife in person at the LGBTQ center at my college, we were friends for awhile, started dating, then got married a couple years later.
I'm not sure what dating apps optimize for. It's easy to say "for hookups!", but it seems like a very low% of matches on those apps lead to any kind of in-person connection, date or hookup: anecdotally I think I had a few hundred matches on Tinder, but only went on ~10 dates / hookups as a consequence. For most matches, the conversation would fizzle after a few messages. Maybe it's different for straight people?
My hypothesis is there's a "Market for Lemons"[1] problem here: take a pool of potential matches on Tinder. The pools narrow like so:
100% of people are on the app (given)
xyzPeople in each pool will be selected out of the swiping pool, leaving the people left for you to swipe on being, on average, less committed to ultimately going on a date. For example: people in the `z` group will get into short/long-term relationships and stop using Tinder. People in the `y` group will be busy texting with someone they met on Tinder (using pickup lines, etc.) and swipe less. Etc, etc.
I'm not sure how a dating app would solve this issue. Traditional ways of finding partners, like meeting people at a bar or hobby group or at college, doesn't either: it's just there's a benefit to making friends or talking to people beyond trying to hook up or start dating them. Most people, if they make 5 friends at a college club but don't start dating any of them, are still happy, I would think.
[1]: https://en.wikipedia.org/wiki/The_Market_for_Lemons
[2]: Why would people match or reply to a message, but not want to go on a date? I've anecdotally known several people who do this: some just wanted validation from random strangers, some are just shy and would theoretically want to go on a date but didn't work up the courage to actually do it, etc. etc. Lots of reasons.