Cause I was looking for it anyway: https://klarasystems.com/articles/openzfs-storage-best-practices-and-use-cases-part-1-snapshots-and-backups/
It's still being kept barely alive for whatever reason. But it hasn't gotten any reasonable updates (I think not even including security updates as of recently, see https://www.libreoffice.org/discover/libreoffice-vs-openoffice/ ).
See also https://blog.documentfoundation.org/blog/2020/10/12/open-letter-to-apache-openoffice/
According to their GitHub https://getgrav.org/ is an "excellent alternative".