I didn't find the article cynical at all - on the contrary there were stories of several couples who had found a way of being happy and staying in lasting relationships that worked for them despite differences that might have driven them apart if they'd tried to compromise enough to live together.
How is finding ways of making love work for you "part of some cynical narrative" just because it doesn't fit the conventional pattern?
A more positive reading would be that the article shows that love finds a way.
Not to mention, in the nicest way I can put this, I don't really see how any relationship can last forever. I don't mean this as a criticism of my partner, I'm genuinely very happy with her, but I'm also well aware of just how much I change over time.
Tangentially, you claim there's some narrative trying to brainwash people into believe "true love" doesn't exist, but we're just supposed to take your word for it that it does?
Help if asked/needed, but seek new interests that don't involve your partner, and let them find their own. If you coincide, awesome, but don't force it.
Seems pretty cynical to believe that true love requires cohabitation.
Knowing about more types of relationships is extremely useful for designing software. It helps to avoid baking in assumptions about relationship status and the implications thereof.
...that Numberwang has just fallen victim of, for sure...