Hey,
i think the following announcements / links by the ownCloud team could give some insights into this topic:
Based on the articles above i did a few searches at https://github.com/owncloud/core/issues with keywords like “Nexus” or “Infinite Scale” and found the following posting by @DeepDiver1975 in https://github.com/owncloud/core/issues/36232 which seems to answer the question by @cryptoman:
The next generation if owncloud will be called ‘ownCloud Infinite Scale’ and will focus on pure file sync and share. The architecture will be microservice based and will rely on the Go Language.
This new architecture has impact on the deployment model and a deployment on a php webspace is out of scope.
We are in the very initial phase of this project and the classic ownCloud project will be alive for a few years.
Please find more info about ocis in e.g. https://github.com/owncloud/ocis
I hope this answers your question - please raise further questions on https://central.owncloud.org