Since you mention serverless it might be worth mentioning firecracker and v8 isolates.

Or CGIs running on httpd inside HP-UX Vaults, that is how old the idea happens to be.

	▲	ignoramous 6 minutes ago \| parent [-]
		> how old the idea happens to be TFA is missing a host of present-day isolation techniques like Isolates, Enclaves, Exclaves, Domains/Worlds, SEEs/TEEs, SEs, HSMs ...

Thank you for the feedback. I will definitely add them as example solutions for serverless.