The afterlife isn't some sort of realm where time is held in stasis and you just get to be amongst everyone who's passed on. There are ideas in older cosmologies, especially from Egypt or ancient imperial China, that the afterlife was, again, a mirror version of this world where According to that, you would have to get up and work, and there might be technological process that happens on the other side of this veil, just as there's technological progress that happens on this side of that as well. Egyptian farmers would have to get up and plow their fields and worship all the same gods, and basically life just continued.