While I have no idea if the original github comment is real, I have wondered what I would do if Google decided to shut down my Google Voice-then-Hangouts phone

While I have no idea if the original github comment is real, I have wondered what I would do if Google decided to shut down my Google Voice-then-Hangouts phone number. I mean, I've experienced the loss of Reader, and others have lost beloved services in the past, so it's not like it seems completely incomprehensible. As an American living in Europe, the Google Voice number hugely makes my life easier (give GV# to bank, to friends, etc). Being able to call and text to the US for free on wifi or using a little bit of my own plan data is so very nice. I suppose there are some alternatives?