At Castel di Guido, humans were breaking the long bones of the elephants in a standardized manner and producing standardized blanks to make bone tools.

I bet the blanks were used as currency.

For now though, this seems like an isolated spurt of bone production technology. Based on the available evidence, the researchers think that Neanderthals occupied the site and produced the record-breaking number tools that have now been cataloged.

Not fucking likely. You don't get an "isolated incident" of organised large scale production of tools, that comes from a long buildup of tool making over many generations perfecting the design and manufacture of the tools with the knowledge being handed down from one generation to the next via teaching (most likely in a master/apprentice type of arrangement).

The likelihood that they turned up, just decided out of the blue to make a whole bunch of tools, then fucked off is close to zero.

The large scale tool production is also indicative of division of labor. As the tool makers would have worked full time at their craft. Meaning that there was likely some sort of economy where people could trade for the tools, whether simple barter or a more sophisticated currency. They were also making leatherworking tools. Which would indicate that there were secondary and tertiary industries involved in the processing of animal skins into leather and then the creation of clothing and other items from that leather. A complex society is quite evident.