Close to 100% when approaching infinity. Of course the more important question is how soon it will be abandoned. Considering Google is currently advocating Web

Close to 100% when approaching infinity. Of course the more important question is how soon it will be abandoned. Considering Google is currently advocating Web Components with Polymer as the future of the web (google "PRPL" for the details) I think Angular 2 is technically dead on arrival. However Google has a tendency never to settle on a single solution (see TypeScript vs Dart vs Go, Hangouts vs Allo vs Duo, Android vs ChromeOS and even Orkut vs Google+). So they will probably keep Angular around until they come up with something new. That said, Google has a tendency to yank out support as they see fit in the name of progress (e.g. how Angular 1 dropped IE8 support on the spot). So I wouldn't expect any obvious warning signs in advance to Angular 2's eventual demise.