Currently, when migrating a project to AC15, the Renovation Status of all elements defaults to "Existing". Even in renovation projects, the bulk of information typically regards new construction. I believe either all elements should default to "New" construction -- or better yet, give us a choice as part of the migration process.
MacBook Pro Apple M2 Max, 96 GB of RAM
AC26 US (5002) on Mac OS Ventura 13.5