>>83052983
Nah, eukaryotes differently aren't as rare as you might think. Even in this world dominated by eukaryotes there still exists things like thiomargarita magnifica that have come about and convergently evolved many of their traits and even a very large size. https://en.wikipedia.org/wiki/Thiomargarita_magnifica
All they would need is some endosymbiont to help with ATP production and they're set to becoming like the ancestor to Eukaryotes. Beyond that there's Parakaryon, which if it turns out to be a real specimen and not an artefact of degradation would mean that Eukaryote-like organisms have evolved on this planet at least twice. https://en.wikipedia.org/wiki/Parakaryon
I think human-like intelligences and civilizations are self-defeating though, I mean just look at how we're degrading in the modern era and all of the civilizational collapses of the past. We've risen far this time, but that's not guaranteed to mean we will the next time. We've burnt through so much of our natural fossil fuel resources too, so the next industrial revolution will be hindered if it does occur.