That’s a bit unfair. Waze is still going and unaffected by being acquired by Google. YouTube is obviously still going and has become a core part of Alphabet’s business.
For acquisitions that have strong existing user bases, they have a history of keeping them around. I’m surprised by this move, I can’t think of another example where they’ve killed a product with a large user base they’ve spent Billions on. Not that they’re killing FitBit, just reducing the countries it will be sold in.