I would love to have something like this in order to provide the office features for documents hosted in nextcloud directly. Yes, there is Nextcloud Office/Collabora Office but this needs separate provider and is not included in hosted Nextcloud (e.g. at Hetzner). The ease of OneDrive + MS365 in comparison is quite attracting. For my current use (sharing documents in a team of 50 - non-commercial but somehow professional approach) the latter is still the tool of choice. Being able to share a link, which allows others to directly edit presentations and spreadsheets in a browser (while the files are available in a local file structure) is just great.