Have you ever loaded a calendar table with lots of numeric columns (such as Year, Month Number, etc), loaded it into Power BI, and then had to manually go an turn off the default aggregation on these columns? If you build Power BI reports, then I bet you have done this more than once. Jeffrey’s idea was that Power BI should be smart enough to detect a dimension table (one side of the relationship) and to disable these default aggregations. There’s nothing worse than adding a Year column to a table and having Power BI add the years together. If I add a year to a table, I want to slice and dice, not SUM the years.
Matt added a request and see where that gets you.