Also, they are safe to use within filenames and directory names (Filesystem paths) without conversion (at least in today's Filesystem not limited to e.g. 8.3 characters) .

Compare that with otherwise nice ISO 8601 datetime format (e.g. 2023-06-28T21:47:59+00:00): it requires conversion for file systems that don't allow colons and plus signs.

This is a setting in your terminal emulator. For me, plain UUIDs are selected just fine when double clicking.

It's mentioned in the README. "can be selected for copy-pasting by double-clicking"