If you turn it around, all three could also be argued to be solutions to "filters". High yield weapons ensure MAD which prevents large scale wars between superp

If you turn it around, all three could also be argued to be solutions to "filters". High yield weapons ensure MAD which prevents large scale wars between superpowers which would bleed civilization until it collapsed. AI can easily accelerate technological development in areas that solve major problems holding us back. Low cost to orbit is obviously beneficial but I'm assuming that's the opposite of what you were proposing i.e. costs stay high forever which is a filter in itself.