Great!
I just saw that too but haven't had a chance to try it out yet.
My plan is to do the 1.19 upgrade dance today:
- package and upload my 1.19 resource pack
- locally verify that I have the latest versions of everything for the modded server
- upload those binaries to T's game server
- stop the game
- trigger a full backup, delete the large region files, trigger another backup
- download the smaller of those two to my local system
- perform the local smaller chunk deletes
- upload the modified region files to the server
- update the game scripts to use the modified 1.19 binaries
- restart the server