> If you have further questions, please feel free to add them here.
Hopefully this doesn't seem like spamming, but you checked "Close comment posting" for the other ticket, so I need to create a new one ;)
> potential ambiguity
With "" There is a fixed sequence in which the preprocessor looks for the file. It first starts searching in the directory that holds the sourcefile using an "#include". If it is found, it stops, so there is no ambiguity for users.
So from a library user's point of view using "" doesn't seem to introduce any drawbacks, but at least saves one precondition (project include path). Looking at the style of the library as a whole, avoiding dependencies seems to be a major design goal?