I find the recursive search feature useful for when I have a large collection of unpacked source packages in $HOME/src/debian, then I can "cd ~/src/debian; uscan --report" to check for updates to any of those source packages.
As for an example I've run into: https://ftp.gnu.org/gnu/ncurses/ncurses-6.1.tar.gz contains several invalid debian/watch files which trigger error messages in the multiple-package uscan run until I manually delete them. -- Daniel Schepler
