I like that I don't need to render things server-side because then the server is just running a REST-ful API. That way I can write different clients for the API

I like that I don't need to render things server-side because then the server is just running a REST-ful API. That way I can write different clients for the API and don't have to change the server (mobile app, desktop UI, etc.) How is that specific to Angular?