Here's a mostly-available-on-line ebook called "Flint Daggers in Prehistoric Europe".
Here's a summary of the chapters.
A lot of assumptions are baked-in to the interpretation of stone daggers. One of the more irritating is the view that stone daggers were seen as inferior, imitative or less desirable than copper daggers.
There is some discussion in this work that the imitativeness was reciprocating and I'm interested to see if there is any evidence to suggest that one material was more desirable than the other aside from imitation.
If you look at the decline of blacksmithing as an economics problem, was it because of less demand for wrought iron works? Future researchers may conclude that wrought iron gates and fencing were replaced by extruded steel which proves that Chinese steel was highly valued for its strength and uniformity.