It just limits snooping to actors with the time and resources to do it on a large enough scale to capture what they are looking for.
What percentage of exit nodes are run by spy agencies and other snoops? Does anyone really know?
Most of them. The cost to operate top-bandwidth nodes are estimated at least five figures per month. Thankfully the Tor design spec explicitely calls out government panopticons as being squarely outside the threat model. So, adjust your infosec policy accordingly.
[0] https://metrics.torproject.org/rs.html#search/family:C466C9A...
[1] https://nusenu.github.io/OrNetStats/#exit-families (tuxli.org)
[2] https://nusenu.medium.com/is-kax17-performing-de-anonymizati...
> https://metrics.torproject.org/rs.html#search/bauruine
> 1113 bauruine@mail.ru 0.01
You're off by a factor of 350.
I already have. You can get the same or better "privacy" using public wifi with a random MAC address.