Ed Oldham takes us through a common problem:
If you are currently using Microsoft Fabric you will have some sort of capacity associated with your account. This will have a large impact on what you can run concurrently. If you are on a Fabric Trial, you will have access to a trial capacity and if you are paying you will be on a certain capacity tier based on how much you pay. The following diagram shows information about each level of capacity and the Trial. The Trial resembles F64 capacity but is apparently different in some important ways (More on that later).
Read on to learn more about capacity and what that means for concurrent notebooks and Spark jobs.