I felt that the asymmetry of the first extension (the purple part with green roof in the middle) was a bit too jarring and the support for that structure was questionable looking, so i added another section to even it all out and put an observatory dome on the top so that it didn't look too symmetrical.

NixOS is immutable and highly reproducible, with the ability to rebuild identical systems with a declarative configuration file--including installed packages.
So in the case of multiple public computers, you would only need to create/maintain one configuration file that defines all of the user profiles, permissions, restrictions, settings, software packages, you name it.
It would without a doubt be what i'd choose for a fleet of public library computers. Extremely reliable and easy to setup to prevent tampering or misuse.