Does Raspbian Buster's overlay file system work with Zynthian?

[Baggypants]

Someone had a go with it, search found it pretty quick.

Using overlayFS for read-only SD cards

In order to make Zynthian more “Live Friendly” and tolerant of unexpected power down, I am looking into what is required to bring overlayFS into Zynthian. OverlayFS provides a shadow filesystem so that the root filesystem can be mounted as read-only. When a reboot or normal shutdown is performed, a sync operation occurs and the root file system is mounted as read-write, and the modified files are copied to the SD card and then the filesystem is returned to read-only status before final shutdown…