We can not use Caddy as long as a reliable and battle-tested rate limit module does not exist. "Work in progress" is not something I would like to put on a production system.

It would be great if you would like to finish the work on this project and make it part of the Caddy default distribution.

Honestly I do not understand how people run high-traffic sites without rate limiting. [D]DOS attacks and other misuse (e.g. spambots etc.) are daily issues on the internet, do you just ignore that?