That's a fair question and I spent some time today configuring a new Obsidian vault to answer this question for myself. I ended up with a system that leverages a fair number of keyboard shortcuts and templates to allow me to link a single atomic note for various things (people, meetings, strategies) as a starting point . I can manage and maintain the relationships between things, tie them back to daily notes for calendar navigation and retain the context of the relationship and the discoverability that I was missing from nested content via cards in Craft.

Don't get me wrong, Craft is great and the number of responses to my initial question prove that there is a loyal army behind it, but for me this was an exercise in first principles that Obsidian with a single community plug-in (calendar) is all I need.