Maybe Google, because of the search engine. Android: somebody will fill the void.

Messaging: people have been switching on hordes to every new free messaging system in the 90s and early 2000s, we will adapt to something else.

Netflix and video in general: same thing without the 90s/early 2000s.

Amazon: very convenient store, we'll spend a little less and somebody will fill the void.

Apple: can't say, never bought anything from them.

By the way, when I couldn't message on WA today I thought day they finally cut me off because I still didn't accept their new privacy policy from months ago :-) I resolved to wait and see for a couple of days.