Maybe this thread should be archived?
I kinda don't think so. Because for one thing, the CO2 levels on planets with terrestrial plant life are too high. In other words, there are almost no breathable worlds in SE. I had raised this concern earlier during RC3, but it seems it wasn't fixed. (Although it was not ignored by people either.)
Edit: Not too long after this post was published, I found that there is now a 0.98 troubleshooting section. Maybe this should be archived. I'm not sure.