There is often good reasons for these purposeful digressions. I.e. in nginx the unit tests cover cyphers that are considered unsafe and not supported by modern

There is often good reasons for these purposeful digressions. I.e. in nginx the unit tests cover cyphers that are considered unsafe and not supported by modern libraries like rustls https://github.com/rustls/rustls https://github.com/rustls/rustls. It is reasonable to make a new implementation and leave behind a bit of baggage.