Oh, thank you! Yes, that scene in Star Wars really touched me.

What would be the point of a continued existence? Sure, one could go on and collect more experiences and more data but would that alone, without anyone to share it with and no 'end' in sight, be worth carrying on?

The more machine you become the less desire for human experience there is. Is, what I would say. But in fact, a man is a man. A machine a machine. There is no such thing as a man-machine. Even though people have pacemakers or extremity replacements made of artificial and electronic parts they are still humans. Yes, people are social beings and must relate to each other. Being alone forever would clearly kill you.

if there's no sense of self (only motions to sustain) and there aren't any others (no one to speak the name), does that make it useless?

Hm ... not sure. What do you mean by "it" in the question "does that make it useless?"
I assume you mean identification? My answer would be: Yes. It would be useless to identify myself with a name. If you think about it ... it even now becomes useless after you repeat your name loudly ten or twenty times in a row. ... ;-)