thank you for reminding me of a couple more great stories!

But, if you believe these are superior writings to the one in TFA you should probably expand on why.

IMO The Last Question is so loved because it hits readers with a much stronger emotional force than Nightfall or The Dead Past. Possibly it's the usage of that specific formula, at the end, which already carries so much weight.

I, for one, believe only another short fiction had the same effect on me when i first read it as a kid: Frederic Brown's "Sentry".