Was actually thinking, once you've integrated it with a CI action and cheap static web host, this replaces Confluence in many ways. Looks like the basic editor is and will remain free.
This could be a pretty great approach. What should be especially nice is being able to blend automatically-generated documentation and e.g., automated testing reports, etc. in the same host/site as more manually curated documentation.
Maybe this would also solve the other problem with Confluence--that people end up using it as a junk drawer. DO NOT PILE YOUR TRANSIENT MEETING NOTES IN THE SAME SPACE AS YOUR TECHNICAL DOCUMENTATION PEOPLE. It fills the search index with noise and makes it impossible to find any information except the stuff that was only relevant for the two days after it was written three years ago.
On that note, it seems like the primary downside of this is that you don't get search indexing at all unless you also configure and integrate something like OpenSearch.
