A new feature added in Revit 2023 was for demolished elements to maintain the connection to whatever system they were created on. This is helpful in some applications, especially in multi-phase projects where that connectivity is needed. However, for a lot of projects, it can be very burdensome. Because the demolished pipe/duct is still connected, a new pipe/duct cannot be added until the demolished one has been split and removed from the system.
When selecting an element to be demolished there could be an option to either remove it from the system or not. This would alleviate any issues for both the people who need the connection and for those of us who do not.