Can’t speak for OP but I can say that I switched to proxmox from just running docker and services native. Proxmox offers a lot of flexibility, you can do snapshots, build many different LXC containers very easily, to keep things separate or have better control over resource usage. Also I run mine in a 3 node cluster so I can do live migration of VMs and pretty quick migrations of LXC containers. This all allows me to run my services with little to no downtime and have redundancy.