Maybe not what you want, but I’m running Nextcloud on a Raspberry Pi (4B to be precise). I would highly recommend that if you’re looking for a cloud-like experience with auto-uploads etc. Plus you can host all your calendars and contacts via it too. Just make sure you’re not running it from the SD card (use an external SSD), as I had some trouble with bricked SDs.

Great news, and great that work that criticises extractive institutions got recognised. If you haven’t read it, I can highly recommend their book ‘Why nations fail’