I can see why more people remain single now they have more choice. I was married, now divorced, and like several PP said can't see what the point of another relationship would be. I have my own home, career, friends, working towards early retirement in my early 50s I hope, love living with just DC and would certainly never entertain introducing a man into their lives let alone their home. This space is for me and them.
It would take a lot to convince me to bother to date someone even. The idea of "advertising" yourself online and having to deal with lots of stupid messages to filter out idiots seems cringey and exhausting. I can only imagine people doing that if they really, really want to date. When I go out I like to have dinner with friends, relaxing familiar company that is fun. Thinking about it even if I met someone naturally, giving up my little bit of "me" time to go on dates and have to make an effort with small talk to get to know someone and get past initial awkwardness etc, uuugh. So I suppose it would only happen if I met someone through friends and got to know them slowly in other situations and could skip that whole part of it that it would even be possible.
I love time on my own and am never lonely. I never have enough time to do what I want to do! I do wonder whether when the DC leave home and friends are older so don't want to meet as much potentially, if I might get lonely though. Although I loved living alone before marriage. Perhaps it would be nice in 15 years or so - when I'm nearing my planned retirement age - to find someone to hang out with regularly, go on holidays with sometimes? But I have less and less tolerance for any crap or irritating behaviour from people, neediness or drama, so I think it'd be hard to find someone I clicked with and found interesting enough to make it worthwhile. Someone worth spending time with but who is on the same page about never living together, never entangling finances, not making demands and just meeting up sometimes if and when we both felt like it. And also attractive enough: most men my age look awful! Can't remember the last time I saw one who looked physically attractive to me.
Maybe people will have relationships now in a different way, much less of this "all or nothing" idea that you must live in the same house, marry, financially tie yourselves together, aim to stay together forever, only ever have emotional or physical intimacy with one person? Maybe lots of people will have relationships of sorts but maintain far more independence. There's much less cause for frustration or people staying in unhappy relationships if you don't get sucked into living together or being financially co-dependent, so it may be far healthier and lead to happy relationships that actually last longer! Who knows. Will be interesting to see what the current 20 somethings who are staying single are doing in 20 years: whether they've stayed on that path or change their minds later.
Despite my marriage being a disaster I wouldn't change it now I'm free as I'm really glad I had my DCs. But I'm much happier now I'm divorced! Men now kind of seem... obsolete? I have some lovely male friends but can't see what a relationship would add to my life really. Friends generally moan about their husbands a lot...