Update: after a day of real world usage, sat stacking notifications are kind of a lot. I'll probably have to "island" coinciding notification types with the option to expand them. I believe this is what twitter does ... If you have more than a few replies at once, it shows you a few then has a "see more" if I remember correctly.
If anyone has any such feedback about the feature I'd appreciate it.
Not going to prioritize this over tips but it's something we'll probably want at some point.