High Availability Proxmox clusters are amazing
Keep your essential virtual machines with virtually no downtime.

Once you accumulate enough self-hosted services and reduce your reliance on someone else's cloud, a murky question starts to hang in the air. Sure, you save untold riches every month by not paying for subscriptions. Still, part of that subscription fee is towards server maintenance and resilience so that the cloud provider has near-perfect uptime, and you can access your data at any time you need.