I've wanted to build something like this for a long time because I tend to use normal notes for a lot of basic calculations (e.g. personal finances, budgeting, etc) that don't require a spreadsheet, so this is really cool. But I probably wouldn't use this because there's a lot of intertia to just continue using my existing notes apps (Mac Notes mostly) because of the ease of syncing and integration into rest of the ecosystem. I wish this could be just a plugin to stuff I already have so its not another app I have to use.