You never actually marry. No institutional stuff. No expensive dress to fuss over and never wear again. No huge expensive party for a lot of people that you actually don't like but have to invite. No expensive "honeymoon" vacation that has to be super special and that everyone around you wants to fuss about. No other expensive big party for all those people at 25 years married etc.
Instead you just get the same tax benefits as a married couple for having lived together for a certain amount of time. You stay together as if you were married for however long it lasts. Which in lots of cases is the same 50+ years some people stay married. Or not. No need for a paper. If you guys work out long term you work out long term. If you don't, you don't.
I'm glad this is finally past us in at least some places in the world. Unfortunately not everywhere. Not even in Canada or the US and other such countries.
I think the 50+% divorce rate in itself isn't the bad thing. It's not the root cause. It's just a statistic that shows how unhappy a lot of marriages have always been. But until recently-ish (and still in some places) people couldn't get out of it and endured it all and you can't tell me that they were better off that way.
You can treat "it" as a life-long treatment without all the pressures and the paper and all the other stuff.