I know that the mac implementation is poor, but Legacy windows HTML export is perfect: the note links are relative links to the proper html notes in the folder hierarchy and all resources can be navigated from within the notes. It really behaves like your own private website.
Also, different from the bloated V10 html, the legacy is very compact and readable.
Now, more than 2 years later, V10 developers are still "working diligently" at coding a basic html link. Please electron developers, If you don't know how to do it, have a look in the legacy windows implementation, you can learn a lot about basic web technology...
If legacy would be stopped before this is fixed in V10, I'll be forced to quit immediately to safeguard my precious data