A very needed tool, John.
Can we have a dedicated link to https://feedback.directadmin.com/ from https://forum.directadmin.com/?
It will help newcomers as well as the existing users to track and engage in the Feature requests.
Version v188.8.131.52 for Apache released 12 days ago.
However, Nginx version is too old as @duntuk said.
They may release a new version for Nginx as well like Apache, who knows.
But both Apache and Nginx repository seem active.
Many internal and external factors affect TTFB.
Distance from visitors and origin server
The network connection of the visitor
Installed firewall and other security on the server or WordPress itself
Redirection if any
The network reliability of the DNS provider and registry
Plesk WordPress Toolkit seems very impressive, and cPanel will have this feature soon.
WordPress Toolkit helps to manage multiple WP instances easily. I think we can manage Managed WPs with such tools.
Can we have this type of features in DirectAdmin?