"Old Transcript
Details of this transcript have been garbage collected."

@Krenair Even if I get a recently closed task such as Task 207343 and attempt to view the transcript at https://phabricator.wikimedia.org/herald/transcript/2815487 (which can undoubtedly not be garbage collected) I still get an unable to view error as demonstrated above. As a user before today I could view such transcripts when logged in. Why can I not do so now?

Interesting. I can view that, and I probably don't have many privileged groups.

Odd. I heard that some functions were to be restricted to Trusted-Contributors (such as security task flagging) so that may be the case with Herald logs. Is there any way for me to be able to view the logs like I used to? It can be quite useful at times.

Oh, apparently I'm in that one.

@Sau226: The "Can View"/"Can Use" policy of Herald defines this. It's not possible to split viewing Herald rules and being allowed to create Herald rules. We've seen some random unneeded rules created that slowed down performance in the past.
I don't see reasons (yet) why to change the current behavior. Apart from curiosity, which problem would this solve?
Do you have a specific example when this could be useful?