Actually no, the "photonuclear" region is actually already achieveable, the issues in that field are more mundane/engineering related, often how to increase eff

Actually no, the "photonuclear" region is actually already achieveable, the issues in that field are more mundane/engineering related, often how to increase efficiency, how to make things repeatable instead of 5 shots per week, etc. 1e25 W/cm^2 is approaching the next frontier, the strong field quantum regime.