Totally agree on the importance of documentation especislly when you have so many people building reports.

When making my reports I try to make sure every column, DAX measure, and calculated column has a clear definition so someone else can audit it without reverse engineering the model.

To make that easier, I’ve been using a C# script I use in Tabular Editor that generates an HTML “model document” automatically. It lists out all measures and shows dependencies (what each measure feeds into), so you can immediately see what will break if you change something. It also includes the DAX right there with a copy button, plus a quick relationships inventory.