Nearly all the performance reviews between the stock Apache and Nginx at their hype time were equal to compare Word vs Notepad. An Apache installed from distribution package (with their range of enabled modules) and an Nginx compiled from source without nothing.
A vanilla and good built Apache it's perfectly fine for realworld use, at the same level than Nginx, because when you are close to the limits of this pieces of software, your scalability problems are in other place.
EyeOS was developed around 15 years ago, when the internet enviroment was on the beginning of web2.0, so things were so different... Now, nearly all of those every day use programs have some sort of web application release or equivalent.
It's something like WindowsCE who tried to move the workings of the desktop to the mobile instead of a fresh interpretation of the platform like Android did at their time.
Instead of sending a request before every defined case in the CORS policy, it could be implemented requesting only one GET to a plain file (fully cacheable) with the domain policy definition.
Seeing it I remember a firewall management gui that was one of the first easy and simple “firestarter”, sadly it was discontinued time ago, before Ubuntu release their “ufw”, which was very similar.
Seems promising this tool.
It can dump the configuration to text files and later could be consumed by terraform.