Of course this is great news, however, it is worth taking into account it took them 25 years just to double the energy output. They are also nowhere near long sustained operation of such reactors. It really requires an order of magnitude increase before nuclear fusion becomes a realistic prospect in two decades.

I understand this just to validate design choices and it is a good step forward. However, it doesn't make nuclear fusion a reality in two decades unless further records are set using this design