When can artificial vanilla extract be used in place of real vanilla extract? There's another question about the difference between artificial and real vanilla extract, saying people can tell the difference, but perhaps not in baked goods. The labeling can also be confusing. 

So I am curious, I would like to know when to save some money and use imitation;


What are use cases for using imitation vanilla without it being apparent to the taster, especially in restaurants and the food industry? 
What type of use cases will imitation vanilla be apparent? 
Are there specific types of applications where the quality of real vanilla is utterly necessary?
Wikipedia has a nice  link explaining a study in which real and artificial vanilla are compared:

It explains why and where it is possible to substitute one for another without losing flavor. 

The gist of it is that real vanilla has a lot of flavor notes apart from vanillin, but these begin to bake off at around 280-300 degrees. So cookies with artificial vanilla tasted better than with real vanilla whereas cakes (which rarely exceed 210 degrees) ranked better with real vanilla, as did other uncooked or cold items.

The article also deals with the amount of alcohol present in pure vanilla extract and in artificial vanilla, and explains how that affects flavor.
Based on that, I would suggest artificial vanilla for baking/cooking at high temperatures and real vanilla otherwise.