> I guess state agencies already know all nodes or may know all nodes.

Assume the same.

>The idea is to amass as much information as possible

Reminded, from 2012: https://www.wired.com/2012/03/ff-nsadatacenter/

All Tor nodes are publicly known. Just knowing them doesn't help tracking at all because of onion routing, they would need access to all nodes.

https://metrics.torproject.org/rs.html