> Is anyone else suffering from ONTAP 9.10.x upgrades that are breaking Commvault SnapProtect due to the deprecation of SnapDiff v2 API?
If they didn't know about it, yes, they may be suffering.
> I am looking for what others have done to get around this. NetApp Cloud Backup?
Among other things.
You could also check with CommVault if they plan to add SnapDiff v3 support soon. I'm not familiar with their roadmap and even if I was I probably couldn't disclose it.