Update: Not sure when this happened but I was checking the requirements for FS on Linux at Dropbox.com and apparently they DO support BTRFS once again. So the process outlined in this post is no longer necessary.
See announcement: https://hardware.slashdot.org/story/19/07/22/1534200/dropbox-brings-back-support-for-zfs-xfs-btrfs-and-ecryptfs-on-linux
Old article: This is less of a write up and more of a PSA:
Want to put BTRFS on every device you have like me because you can’t get enough of CoW FS? Especially for operating systems? Because snapper? cgroups? timeshift? machinectl? The list goes on…
