Shading slf4j causes logs to not appear

[Jolyon-S]

Using an slf4j logger inside of a shaded project causes the logs to never actually get logged in the right way as slf4j also gets shaded inside that project, and it won't discover any of the actual logger impls.

[j-baker]

The implication - should we ban shading slf4j?

[carterkozak]

Same problem applies to metric registries which rely on SharedMetricRegistries/SharedTaggedMetricRegistry.
The default configuration could be more helpful to avoid specitic foot-guns, but I don't think we can realistically solve this class of problems as long as we're shading classes.