Thanks for sharing your thoughts @Myctery, fortunately everything you have mentioned we are actively developing. With every new feature we add we are conscious to make sure it is performant, as Supernotes is all about speed 
- Graph view will actually replace the noteboard view, so you will still have access to all the filtering options that you are used to. By clicking nodes on the graph this will pop up cards.
- Tagging will be greatly overhauled with the new editor. We will make it faster and more seamless (esp. with inline).
- Really happy to hear that our search functionality is working great for you thus far! You are right about the increase in notes often reducing the power of search, we are looking into ways we can prevent this. Similar to this topic - Ranking by recency/context in the Command Prompts
Looking forward to sharing all of these features with you as soon as we can!