[tim333]

Re Q>1, isn't that just the reaction making more power as heat than you put in and you need something like Q>5 to use the heat to make steam to make electricity to run the thing? (as in wikipedia https://en.wikipedia.org/wiki/Fusion_energy_gain_factor)

[0x457]

Correct. Energy generation >1 is targeted for 2030. So it fits "fusion is 5 years away" trope.

[wiml]

Fusion used to always be 30 years away, more recently 15 years.

[0x457]

Less science personal company has, shorter the due date.