> A technology demonstration or demonstrator model, informally known as a tech demo, is a prototype, rough example or an otherwise incomplete version of a conceivable product or future system, put together as proof of concept with the primary purpose of showcasing the possible applications, feasibility, performance and method of an idea for a new technology.

Verdigris has been developed and maintained now for over 4 years. Not only does it work - it has unit tests, CI and issues are addressed by the maintainers.

While verdigris does demonstrate that something is technically possible, so does Apache httpd - does not make Apache httpd a tech demo.