It is. I was just using WinDirStat as an example of an old app that people still use. The 1.1.2 release from 2005 is still downloaded 60,000 times per week according to the stats on the Sourceforge download page.

I use windirstat almost monthly and have never heard of WizTree. Keeping this in mind for next time I use it.

Though at this point, maybe I should just commit honestly