The whole promise is that reversible computation is theoretically free (in quantum information theory) , quantum computer can exploit it by using quantum superposition to brute force 256bit key (and larger) in a single computation cycle.

There's a massive fundamental flaw in the reasoning behind this.

It's the second law of thermodynamics - entropy always increases. While computation is free, reversal of entropy isn't. What we're being promised is a 21st century version of perpetual motion machine.

Additional explanation:

Think about private key as low entropy, and public key as high entropy. Owner of the private key has cheat code in the form of missing information which allows reversing the entropy of public key.

However in order to break the cryptography you have to reverse public key back into private key without having access to it. The regualr way is to search for flaws in the cryptography scheme that allow reasoning about missing information and consecutively - private key recovery.

But if you do a brute force attack you are 100% forced to pay full thermodynamical price of reversing the entropy. And 2^256 is way, way more than you could ever afford. Even Planck scale values multiplied by that number grow into universe size and beyond.

In summary, quantum computing can skip time component of brute forcing a key, but it can't skip the energy costs. So it will never happen.

Let me ask one question: If you had your own world at your disposal to play with it like a god, would you stay aside for eternity, or would you jump in to stir some shit up? When I play SimCity, or Worldbox, or other sandbox, I always get bored and start dropping all sorts of calamities. I'm telling you, he's either going full VR as Donald Trump or maybe Mark Zuckerberg, or he opens dev console and makes plague with transmissibility set to 9999. Except he'd never called it COVID. More like 'Rectal_Intruder_6969'.

Nvidia GPU connectors are still burning bright. Or bronze..

Source: https://www.reddit.com/r/pcmasterrace/comments/1u85htp/my_turn_today_boys_caught_it_before_it_turned/

The main problem of most developed societies is horribly low fertility rates. Lot of women pick very long education path and then career thinking about having children only in their mid 30s... When their fertility is mostly gone.

I think education system for women should be tailored towards different things than men. Teenage girls should have better knowledge of psychology (especially child psychology) health, childcare ect. so they are well prepared to build strong stable relationships and start families when they're actually fertile. I'm not talking here about giving up on career of course, it's a personal choice, but I wish the education was complementary for both genders (so couples benefit from different specializations of each other) rather than uniform.