people always say about nuclear fusion: it will be here in 30 years. However, it may this time:
Magnetic control of tokamak plasmas through deep reinforcement learning | Nature
Basically, the main problem with tokamaks is how to confine the plasma continuously.
It's juggling the current in a lot control coils at the same time. Google DeepMind managed to hold the plasma stable for 2 seconds on its own. Don't laugh yet, the record on this kit (it's a variable control tokamak) by the engineers was 3 seconds before AI.
The current world record for stable plasma in a tokamak is 18 minutes held by the Chinese. Let's assume that AI advances about 100% every 4 months, it will be about 5 years when AI can do this.