The thing with flame graphs, pie charts and all that is that I rarely find it that useful to see multiple directory levels at the same time. Unless it is /var/log/omg-why-dont-you-rotate that occupies hundreds of gigabytes, I always end up navigating through the largest near-the-root folders with baobab just to make room for subdirectories on the screen, which is hardly different from the typical ncdu (or even 'du -hs *, then cd') workflow.