Thanks for the contribution @LantzAndreas - I’ve added it to the Constellation 101 so it can be found with other useful Constellation articles.
You’re right to call out the caution; just because you can, doesn’t mean you should 
The downside to this, is you are hardcoding that experience. The system would no longer remember your user preference between logins, it would always be collapsed/expanded.
From a UX perspective it would seem better:
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Ensure your Change Management / Go Live activities include training on this feature - users can decide on their preferred view of Summary Panel (left) and Utilities (right)
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Create a simplified view for more occasional users, so they are not overwhelmed by all this detail (that they probably don’t need)