Or what if the 'mountain people' are utterly microscopic mites on a tiny ball hurling through space. Ohh, wait, that's the reality.

sidenote: I doubt mind uploads scale all the way up, and it appears quite likely that amoral mind uploads would be unable to get along with the copies, so I am not very worried about the first upload having any sort of edge. The first upload will probably be crippled and on the brink of insanity, suffering from hallucinations and otherwise broken thought (after massively difficult work to get this upload to be conscious and not to just go into simulated seizure ). From that you might progress to sane but stupefied uploads, with very significant IQ drop. Get a whiff of xenon to see what small alteration to electrical properties of the neurons amounts to. It will take a lot of gradual improvement until there are well working uploads, and even then I am pretty sure that nearly anyone would be utterly unable to massively self improve on one's own in any meaningful way rather than just screw itself into insanity, without supervision; sane person shouldn't even attempt that because if your improvement is making things worse then the next improvement will make things even worse, and one needs external verification.