When a client is looking for information on how to leverage an EA tool or how to look at the analysis that can come from an EA repository using the tool to create reports and dashboards, I can demonstrate that to them.
I can demonstrate capabilities of what EA tools should be doing and how they should be doing it.
Whether the client has a current tool in place or not, I can compare the information that needs to be gathered when you're documenting your architecture. Then I can tell the client that this is why the information is important to document. It may seem trivial or non-important at the time but it's important for later on because it allows for analysis and to do things such as project interdependencies reporting. This provides the ability to identify lags in the project delivery, where projects may depend on capabilities being in place but are not in place already. You will now have a lag for another project that is going to deliver early.
It gives you things for capability overlaps, gaps, and standards.