You always think that if one of these people joins your company it won't matter to you. You won't see them in the halls and they probably won't do "normal" work.

My wife used to work at Dropbox when Guido worked there. Apparently he was quite active on the company-wide mailing lists, even talking about mundane things like the food or parking.

So MSFT employees you may get a chance to chat with Guido!