I suspect if Office Online Server was a significant revenue source, they would keep it up. Instead: Remember that storing files in the cloud is highly commodit

I suspect if Office Online Server was a significant revenue source, they would keep it up. Instead: Remember that storing files in the cloud is highly commoditized, especially by Non-Microsoft companies. The APIs to hook cloud storage into Windows are well-documented. This is a niche best served by small-medium sized businesses, and/or open-source software.