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Facebook has a Chef cookbook called cpe_nightly_reboot for their Macs. I can't think of why that would be required, but they must have a reason.

https://github.com/facebook/IT-CPE/tree/master/chef/cookbook...

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I don't work at Facebook, but I'm fairly certain this is for things like build servers, not client machines.

They use Munki for software updates, which, just like you describe, gives the user a grace period where they can reboot at their leisure. Ignore it for long enough and it'll crank up the nagging, and eventually force a reboot.

this is for things like build servers, not client machines.

It talks about killing GUI processes. Is it common to run a display server on macOS servers?

Yes. Services that can run without a display are better run on a Linux server anyway.

I assumed it was for compilation of iOS apps, do those need a display?

No, you can compile iOS apps from the command line.

I don't think it's possible not to.

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