I'm in the US and my family is in Brazil. I relly on WhatsApp over 3G/4G to comunicante with them as they are usually without access to faster internet (DSL/cable). I read about the blockage a few hours ago and made me concerned because if anything happens that's the most reliable channel I have.

Then I receive a message from my brother saying he was going to the hospital (on WhatsApp, just before they cutted it off). Fortunately he had time to tell me he is fine.

My other brother is in a ship, almost same connectivity problems.

I know that there are workarounds, other applications, vpns, IP masking etc. But WhatsApp is something that my parents and brothers can use.