Media Manager was great, and I miss it, for other reasons than Note Taking. Project Notes is a poor imitation of MM. I’m using it now, but it’s got a long way to go. However, I will say this, PN does make me become more focused on the Narrative and not commit time and energy to being retentive with the process, MM could do that to me, or rather I allowed it to 😉!
But yes, a Global summation of summaries of Projects would be good, I guess 🤔?