Google abandoning a platform or dropping support for an API is hardly even news. They do this constantly. It's a hard lesson we developers should always keep in mind when selecting a platform, language, or toolkit.
But what consequences would you draw from that lesson?
Learn Rust instead of Go. Choose React over Angular.
Meh. Those technologies are poor examples of your point, imo.
The Angular 1 / 2 situation is a great example. The Rust over Go is some advice based on the lesson learned.
Personally speaking: Relying too much on 3rd parties (especially from companies like Google that have a history of removing systems) can break things. Design your systems to be resilient and standalone as much as possible.