Spirituality is a methods to handle emotions that feels bad in humans since emotions appeared in less complicated beings. Adult humans receive lots of negative signals in their brains for all the cognitive dissonance they accumulate in their brain. Very little is simple and pure as an adult, and the effect of religion is to fools your brain out of pain loops and to give you more peace and quiet. Just follow the code and be happier.

It is a good decision from an utilitarian point of view as long as your purpose of existence is your individual happiness. It’s a disaster at the species scale though.

Animals using their emotions to decide is natural and humans can’t be easily blamed for turning to religion. It is an idea that comes with natural defenses. If you let someone make you doubt you’re warned god might abandon you, so you fight this agression that makes you feel bad emotions.

I think the end of aging and most of what you mention will actually put religion on the spotlight without ending it at all. If technology create a world that make their religion absurd, then the maddest of the lot will take control of whatever his cult is and convince the other dumbasses to destroy anything in the world that contradict religion.

Obscurantism already happened on history and will totally happen again since the cause of it, religion, hasn’t changed.

I think the only think that will put it down is telepathy, brain to brain connection, if it ever comes to exist, since sharing thoughts and primal emotions will change the state of play where religion strive, the conscious mind.

So no, IMO by 2040 religion will be just as big a problem