Agreed. I can't stay with one of my servers on 6.8.3 because my cache SSDs are slowly but steady being killed by Unraid. Any update on the RC would be welcome.
I can confirm this problem on 6.8.3. I managed to minimize the amount of written data by disabling all non-critical logs on vms and docker images but it is still 1-2GB per hour even if barely any data is actually written.
I will wait for 6.9.0 RC1 but I'd love to see a hotfix for 6.8.x as well.