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> much-improved memory utilization between multiple memory cgroups

There will be no improvement if I don't use memory cgroups, which means it's not related to a typical desktop or server without containers. But still good news, the use of containers can only expand.

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Systemd uses cgroups heavily, so chances are your typical distribution runs hundreds of them under the hood.

Thanks for reminding me about systemd. I just used "systemd-cgtop", and yes, I see 38 cgroups, one cgroup for each service/user. But 88% of the memory is used by one cgroup: user.slice, for all the program started by me under the desktop. So I'm not sure it can save a lot of memory on container-less desktop.

Surely good for all servers.

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