Comment by jacquesm

We have a whole workflow around Google's original 'drive' product which is neither quick nor easy to replace. Lots of people around the world collaboratively work on a single document during one-week project stints. This includes video conferencing, transcription, interview sessions, document preparation, proofreading and the processing of feedback and comments from the customers. Single-sign on as well as good basic security are a must. Moving this to another stack of cobbled together applications is possible in theory but a boatload of work and it would most likely compromise security in subtle ways and reduce the quality of the work product.

This is not just about Google 'search' (I wished it was...).