Im not arguing with you cramer, im saying that your experience in the past 20 years does not match the experience of others.
Attached is a picture from vmware vsphere 5 running the standard vswitch with CDP information.
CDP is not only useful in a pure cisco network either, plenty of systems have been configured to add value through use of CDP:
In a datacenter with 7000+ hosts you dont have to worry about shutting down a port or tracing a cable to figure out which host and interface its plugged into.
Link layer discovery can be worth its weight in gold from an operational support perspective.
Also, CDP is only locally significant traffic. A CDP frame from a host is not flooded throughout an entire VLAN, so no need to slay another little broadcast "vampire".