[ale] questions

[Sean]

I just finished installing Libre Office and am left with two questions:

1.  Why did Fedora/Red Hat decide to change yum to dnf?  I am used to seeing 
"dnf" in the agate results of a car race, where it means "Did Not Finish."

2.  After installing or updating a package I always run yum (now dnf) clean 
all.  On this new Fedora 24 install the routine always returns "52 files 
removed."  It seems really odd to me that regardless of how much or how little 
has been downloaded and installed, <clean all> always removes the same number 
of files. Any clues on what might actually be going on here?

Sean