I'm not sure Google is eating Microsoft's lunch right now... Microsoft seems to be coming to the lunch table and starting fights for Google's turkey sandwich (search).
Office is the bread and butter of MS, and Gsuite is very much eating into that.
edit: I wouldn't be surprised at all if Amazon released an office(/groupware) style suite also soon. It definitely would be an match, they already have lot of user-facing enterpricy software
edit: I wouldn't be surprised at all if Amazon released an office(/groupware) style suite also soon. It definitely would be an match, they already have lot of user-facing enterpricy software