That looks like a nice tool. It would be helpful if it could optionally run off of a data file. I've used "ncdu" to visualize my restic backups by writing a script that generates the ncdu data format, and more recently I've abused ncdu to visualize process memory usage on macos:
https://gist.github.com/dunhamsteve/59f5e6b9a4bc69039853674d...