This is not the most likely place to find people who can answer to that question.
I assume the reason is because you want the same, 10 years ago.
Of course, that means in 10 years you are going to be exactly in the same place.
But that's the easy, fast solution.
Maybe they assume social networks have a 10-year guarantee, and, after that, they break and you have to look for another one.
@jgg Thank you for commenting.