My team depends on a series of "working" sheets (target sheets) that have a set of predetermined columns that all populate data from a central "data" sheet (source sheet). The data sheet stays static, but the working sheets are frequently added. The ability to duplicate a datamesh and simply change the target sheet would be a huge time saver.
Datamesh duplicate, datamesh template, datamesh change target sheet.
I second this, I just spent ~15 mins per sheet with the same DataMesh fields and the same source sheet. Basically it was 1 parent sheet with 12 child sheets that needed different data form the parent!
This would solve a huge problem for me as I am about to create 86 separate data meshes!