xfs_quota bsoft limit explanation

Using RHEL 8.9, I have xfs_quota applied to each home account folder under /home. In doing xfs_quota -x -c 'limit bhard=1g ron' /home I can observe for example a cp fail when trying to copy a single file greater than the *bhard limit* of 1 gb into /home/ron/. That makes sense to me. However if I only set limit bsoft=500m, and do not do a hard limit, **what actually happens?** Because with a soft limit I can exceed that and there is no indication to me (if I am acting like a typical naive user) so it somewhat seems pointless? Someone tell me how as an admin I would use bsoft either by itself or in conjunction with a bhard limit to manage users carelessly dumping and leaving too much data in their home account. Is there any reason to not do just a limit bhard=1gb on people's home account and let them find out the *bhard* way ?