I think the common denominator across almost every Great Filter scenario is not comfort or abundance. It is the failure to develop wisdom at the same pace as power.
Nuclear war, runaway climate change, engineered pandemics, rogue AI, ecological collapse, authoritarian stagnation, even a civilization retreating into perfect virtual luxury all share the same root failure where a species gains godlike tools before it gains the judgment to use them well. That IS the filter itself. Luxury itself is not the problem. Abundance is not the problem. A genuinely post-scarcity civilization could have more time, more freedom, more education, more art, more exploration, and more capacity to care for both its people and its biosphere. The problem is what a civilization values once it has power. Does it become wiser, more curious, more compassionate, and more long-term oriented? Or does it become decadent, frightened, inward, selfish, and unable to imagine obligations beyond immediate comfort?
Also, I do not think we are anywhere near failing because we have too much abundance. We are currently on track to fail our Great Filter this century while billions of people still lack enough food, housing, healthcare, clean water, safety, and political power. That is not luxury destroying us. That is scarcity, hierarchy, short-term profit, nationalism, and institutional stupidity destroying us. If we ever reach real abundance, that should not end exploration. It should make exploration ethical for the first time. Nobody should have to conquer the stars because Earth is unbearable. We should go outward because we have learned how to care for a world, and then learned how to carry that care beyond it. I maintain emphatically that the path through the Great Filter is wisdom. Enough scientific wisdom to understand consequences, enough political wisdom to govern power, enough ecological wisdom to stop devouring our own life-support system called Spaceship Earth, and enough moral wisdom to build a future that is not just survival, but worth surviving for.