I do Time Machine backups from my laptop to an SMB network drive. No doubt this is inherently unreliable because mounting a disk image over a network connection can result in the disk needing repair if either of the 2 machines turn off, fall asleep, or otherwise disconnect. I currently address this by using 'just-in-time' mount and unmount; and by relying on Alsoft DiskWarrior about once a year when something goes wrong and
fsck can't fix it.
My question: I have kept the Time Machine image on HFS+ because DiskWarrior doesn't support APFS. But maybe APFS is a more robust design than HFS+ and would survive network disconnects? Does anyone know, or else how could I find out, other than by a 2-year experiment with my backups?