What exactly should I sell to you? That comment makes no sense.
You have to do whatever meets your needs. If you don't need or use Whatsapp, that's splendid. Good for you. Nonetheless, I need it. I need it that much that it's a reason to change to another platform should it not be available anymore.
Even if this wouldn't be a rational decision - I have explained why I need it, it's the standard here, everybody uses it - it would still be my own decision to make. And believe me, if it would never return, Windows Phone would it have even much, much worse than now in the Swiss market.
It's strange anyway that I have to defend my opinion in a thread that asks for an opinion. Don't you think?
Anyway, I highly doubt that they won't bring it back. There's even a Blackberry version after all.