This is a must have feature for a “brain” type note taking app. Say what you want about evernote, but I loved their search/saved search implementation:
This feature will be incredibly powerful. I’m currently using The Archive, and it’s their saved search feature that enables me to seamlessly run my zettelkasten, task management system, and daily journal in the same folder. I have a series of icons down the left hand side of the screen that instantly take me to not only what I do want to look for, but also what I want to exclude.
This is one of my more complex searches in The Archive, which I’d love to be able to do in Obsidian: