Nextcloud 28 and OnlyOffice 8

Apologies if this is detailed somewhere, I couldn’t find it. But I noticed that Nextcloud is a couple of versions behind the latest (up to version 28). Obviously I wouldn’t expect updates to the latest version of any software on a service like Murena Cloud, but to be behind a couple of major versions seems avoidable. Is there a roadmap for version updates?

As a side note, OnlyOffice 8.0 has come out. Again, wouldn’t expect what Murena Cloud to be the same as the latest version, but is there a roadmap for updates?

Thanks for an amazing service that almost completely mirrors (and thus obviates) google’s services.