I wish people (and the press) would understand the difference between energy and power. Energy is in Joules, power is Joules per second. So 3.6MJ can be provided by a 1kW wall socket in one hour. JET do not draw 500MW from Didcot power station.
A Joule is not a lot, so talking about MW and MWh makes more sense, and imagine that 1kW powers a house and the industry/transport needed to support it.
The requirements goals of fusion are
1) Temperatures of 100 million K -- done a long time ago
2) A certain plasma density so energy out > energy in -- just about done at NIF ignoring laser inefficiencies
3) Confinement times > 10 s before plasma destroys itself. -- 4 s done at JET, once you get to 10 its effectively forever
So the building blocks are in place, but the engineering challenges to convert the energy out (very high energy particles and radiation) to power the laser, and electromagnetic heating coils are huge. The big projects like ITER move very, very slowly, much more promising are "tabletop fusion" companies like
https://www.tokamakenergy.co.uk using ex-JET scientists, who's cycle time for designs is a few years rather than a few decades. But we are still many design cycles away from commercial use.