5 Reasons 64GB RAM Makes Sense for Multiple VMs

16GB is not enough for more than one VM Running a desktop OS plus a browser and a single VM already pushes 16GB to its limit. Adding a second or third VM will hit swap within minutes, making everything unusable.

Each VM needs its own OS overhead A Windows VM needs at least 4GB to be usable, and Linux needs 2GB for light tasks. Two or three VMs plus your host OS consume 12-16GB before you start any actual work.

64GB gives headroom for eight to ten VMs With 64GB, you can run multiple VMs without micromanaging memory. You will not have to check free memory before spinning up a test environment.

It is the sweet spot for home lab hypervisors For real VM hypervisors like Proxmox or ESXi, 64GB is the practical minimum for a home lab. It balances cost and capacity for serious experimentation.

The only reason to skip it is an old CPU or tiny workloads If your CPU is old enough that DDR4 is expensive, or you only run one or two tiny containers, 64GB is overkill. Otherwise, it is a sensible investment.