And once you get to that point, you need to harness the output energy of a million degrees plasma through something that yields a pretty high efficiency (so that pumping energy into the plasma is not only worthwhile, but makes financial sense) and requires a reasonably low maintenance.
I see fusion more practical as a rocket technology (which is just basically impossible) than as an actual energy facility asset.
Oh wait: thousands of programmers started working on this in the early 90s so that there would be so few failures people thought it was a scam.
The entire financial and government infrastructure was based on ecdsa until the shift to pqc. The consequences of not preparing are literal threats to global economy. That can’t be understated. The cost to switch to (hybrid) pqc is essentially zero when compared to the costs for not doing it.