Often a considerable portion of those logs are useless, trace level misclassified as info, kept for years for no reason.
You should keep a minimal set of logs necessary for audit, logs for errors which are actually errors, and logs for things which happen unexpectedly.
What people do keep are logs for everything which happens, almost all of which is never a surprise.
One needs to go through logs periodically and purge the logging code for every kind of message which doesn’t spark joy, I mean seem like it would ever be useful to know.
