AC is not common in Europe. There’s a variety of heating systems: gas boilers, direct electric heating, district heating, etc. Heat pumps are a growing market though.

Drones work now because they are $1000 (random number in the right range), while a patriot missile is $4 billion dollars each. Sure you could shoot a drone down with one, but if you do the enemy will just send more and bankrupt you.

I agree with the point but these numbers are some orders of magnitude off. A patriot missile is typically 4 million dollars (so not billion). Drones vary widely depending on the type. Man-portable scouting drones can go as low as a few hundred dollars. I don’t think a patriot missile would ever target something that small flying that low though. The Iranian Shahed is estimated to cost around $30-50k. Russia produces its own upgraded version (better navigation systems, bigger warheads, etc.) that costs around $80k.

Even then, you can make 50 drones for the cost of a single patriot. The economics are not favourable.

I think it’s more so that the kind of people contributing to these projects are on balance not that interested in doing the marketing work.

No magnetic confinement fusion reactor in existence has ever generated a positive output. The current record belongs to JET, with a Q factor of 0.67. This record was set in 1997.

The biggest reason we haven’t had a record break for a long time is money. The most favourable reaction for fusion is generally a D-T (Deuterium-Tritium) reaction. However, Tritium is incredibly expensive. So, most reactors run the much cheaper D-D reaction, which generates lower output. This is okay because current research reactors are mostly doing research on specific components of an eventual commercial reactor, and are not aiming for highest possible power output.

The main purpose of WEST is to do research on diverter components for ITER. ITER itself is expected to reach Q ≥ 10, but won’t have any energy harvesting components. The goal is to add that to its successor, DEMO.

Inertial confinement fusion (using lasers) has produced higher records, but they generally exclude the energy used to produce the laser from the calculation. NIF has generated 3.15MJ of fusion output by delivering 2.05MJ of energy to it with a laser, nominally a Q = 1.54. however, creating the laser that delivered the power took about 300MJ.