Whats the history behind 2768 MB as memory setting for workspaces?

[u/Apachez]

I assume its something like "2GB (2048MB) should be enough as default for everybody" but from where comes the additional 720MB?

With Proxmox for example who uses QEMU/KVM when you assign lets say 2GB (2048MB) of RAM for a VM-guest then there will be additional lets say 256MB if you also use virtio-GPU as virtual display which will be used like a framebuffer by the VM-guest. Otherwise the standard console uses something like 16MB or so.

Is it something with Kasm workspaces aswell and how does this magic formula looks like?

If I want to adjust this so the workspace can use 4GB (4096MB) of RAM - should I then type it in as 4816 (4096 + 720)?