When talking about AC power, some of the power consumed doesn’t actually produce real work. It gets used in the generation of magnetic fields and charges in inductors and capacitors.
The power being used in an AC system can be simplified by using a right triangle. The x axis is the real power being used by resistive parts of the circuit (in kilowatts, KW). The y axis is reactive power, that is power being used to maintain magnetic fields and charges (in kilovolt-amperes reactive, KVAR). And the hypotenuse is the total power used by the circuit, or KVA (kilovolt-amperes).
Literal side note: they’re all the same units, but the different sides of the triangle are named differently to differentiate in writing or conversation which side of the power triangle is being talked about. Also, AC generator ratings are given in KVA, so you need to know the total impedance of your loads you want to power and do a bit of trig to see if your generator can support your loads.
The reactive component of AC power is denoted by complex numbers when converting from polar coordinates to Cartesian.
Anyways, I almost deleted this because I figured your comment was a joke, but complex numbers and right triangles have real world applications. But power triangles are really just simplifications of circles. By that I mean phasors rotating in a complex plane, because AC power is a sine wave.
For single player fantasy, Outward is my favorite game to get immersed in. It has a bit of a steep learning curve, but the survival mechanics and lack of a leveling system really aid in the feeling that you’re getting better at playing the game as your gear gets better. The combat encourages patience and preparation rather than jumping into the fray and swinging wildly. And the magic system, good lord. There are several vague categories, but the best way to describe it would be ‘ritualistic.’ There are spells with fairly benign effects on their own that, when used in conjunction with other spells or effects, produce deviating or beneficial results. And the NG+ mechanics are fair and balanced while offering a boost to follow-on playthroughs.
The most significant barrier to entry is the learning curve, mostly learning about combat, patience, and the stability system. But it’s my personal favorite.