10 days quarantine is optimal: 5 days is sort of cheating to try to keep emergency services and food flowing to people

The point being that 10 days quarantine would be IF civilization itself wasn't going to shut down  worldwide to some degree during Omicron. 5 days is a sort of Triage where some people might still be infected by the 5 day infected people without symptoms. But, hopefully, emergency services will continue along with food and water and electricity and natural gas etc. This will be quite a test for civilization worldwide ongoing until the Omicron peaks in various areas around the world.

But, if you have any symptoms you need to be quarantined longer than 5 or 10 days if you have any symptoms at all.