[DetroitT]

"I can't see any reason Pro Tools users should be rushing to upgrade to High Sierra.

Time machine? Anybody risking being at the bleeding edge of OS X releases and relying on Time Machine deserve all the downtime they get.

And nobody should be trying stuff out by upgrading a running system. If you want to be at the bleeding edge, do a clean install on a spare drive or partition and leave your current system boot image alone and a reboot to recover away.

And bootable image backups made just in case with Carbon Copy Cloner or similar.

Ironically eventually High Sierra APFS should help provide a real base for a robust version of time machine. Eventually, once APFS gets stabilized and supported across non-FLASH storage, etc. I'd be hesitant to run on APFS without a great reason.
"
Agree. Nicely said.