FYI there is an upcoming storage driver that can solve this issue
Non-OCIS Owncloud still needs a dedicated database and recommend against SQLite in prod
I’ve looked at rclone mounting with the --vfs-cache-* flags. But I’m not sure how it can smart sync like mountain duck or handle conflicts elegantly like the Nextcloud/Owncloud clients do. Let me know how to set it up that way if possible
Update: there seems to be a more “native” storage driver for OCIS that is currently WIP. It seems very exciting