This is a big reason for me. Also because if anything breaks - even if my system becomes unbootable - I can select the previous generation from the boot menu, and everything is back to working.
It’s very empowering, the combination of knowing that I won’t irrevocably break things, and that I won’t build up cruft from old packages and hand-edited config files. It’s given me confidence to tinker more than I did in other distros.
Less is not an editor, it’s a “pager” which is a read-only viewer for files, or for command output that doesn’t fit in a single screen, or whatever. Generally to control which you want programs use you set the
PAGER
environment variable.The old grandaddy pager was called “more”, as in “there’s more text than fits on the screen”. The successor is called “less”. For most purposes, less is more.