An immensely useful feature of tables in some other applications (I think Microsoft Word) is the ability to use basic cell referencing to insert a sum into a cell. e.g. =[A1]+[A2] to show the sum of the first two rows in the first column.
While I can understand the appeal, this is something completely out of scope for us. We’re trying to avoid adding too many features and this seems to be something unnecessary for a note taking app 
Best.