I suppose we can confidently say that nowadays more and more people are choosing to be single. Plenty of new discourse is forming online about new types of relationships.
Right now, there are situationships, low-commitment long-distance relationships, open relationships, 'eyecontactships', and a long list of other types of ships navigating the sea of romantic attachments.
What doesn't seem to appear anymore in the conversation is long-term traditional partnerships. It's not that they don't exist anymore, but right now, it seems that more people are choosing not to engage in that type of commitment.
Some argue this happens because we have a choice now, and people who otherwise would've jumped into relationships can now contemplate other options. In prior generations, being in a committed relationship after a certain age was pretty much mandatory.
Anyone you'd date in your twenties would be, more or less, someone you'd later have to marry. Both parties entered relationships with that mandate in mind, regardless of whether they knew it was their own desire or a societal imposition, and things kinda went on from there.
I'm not saying that was necessarily a good thing; in fact, I think it wasn't, but somehow I still think the place we have arrived at now isn't quite the best yet. We tend to be more lonely, and relationships have become more fragile.
Having some form of commitment towards another person or a relationship teaches you a lot about yourself, humanity, solidarity, and love; and I think those lessons are very valuable in life.
To me, it would be great if we landed somewhere in the middle on relationships, and I think we'll eventually get there after so much flexibilization. Hopefully, soon we'll all have a variety of relationship styles to choose from, and commitment will definitely be one of them, possibly chosen by many.