I've been reviewing CVs recently, and there is a striking negative correlation between a candidate's amount of experience and the number of specific languages or tools they choose to highlight.

It's also quite striking how the younger and less experienced candidates often have a first page that is pure keyword stuffing now, while older and more experienced ones tend not to. My suspicion is that the younger candidates expect to have to get past a computer and then HR before encountering anyone who knows what they're talking about technically, while stronger candidates tend to start from the technically competent end via a contact in their network and only expect to deal with HR right at the end of the process to dot i's and cross t's.