Examples of the type of annoyance this would bypass, if it were made an option:
Every time I go onto YouTube for example, it brings me to the same video because the autocomplete makes a guess past just the domain (youtube.com). The video starts auto playing, so every time I go to the site I hear the first 6 seconds of the same song. Every time.
When I go to my host’s site it starts me in some obscure corner of the control panel for this same reason.
When I go to my software providers site it starts me on some thread that was deleted a long time ago so it just looks like an error message.
This is pretty annoying because of the sheer frequency that you have to deal with it. Having at least the option for the URL autocomplete to fill out the domain only would be nice.