Comment by Froztnova

It's also a matter of whether it would be worthwhile to reveal the existence of such a capability in a given case.

If I were a government and had just spent a pretty penny on implementing the necessary infrastructure to defeat an encrypted routing scheme, I would probably not use that capability to bust internet drug dealers and other petty criminals, resulting in everyone scattering to a new scheme or to seek security through obscurity in some hand-rolled solution. I'd save it for national security level threats. High value targets.

Though thinking about it further, it would still be workable to gather compromising information on low-value targets without necessarily acting on it.