In Germany on a south-facing balcony, producing your own electricity from solar panels is cheaper than the transmission costs of the power company. Meaning that even if the power company somehow had a too-cheap-to-meter fusion power plant, getting that electricity to you is more expensive than you making your own solar power.
Part of this is that transmission costs are higher in Germany than e.g. in the US, partially because Germany has a much more robust system with far fewer outages. How to structure these costs will likely become a bigger topic as more people produce their own electricity but still expect the grid to be there when they need it.
Fewer outages vs US source? I work in the power industry in the US and I am sure this is regionally true but highly doubt it as a blanket statement.
They are propped up by demand and the fact that most of the new GPUs are marginally better than previous ones.
Also, if you're talking gaming GPUs old ones work fine given there has not been a new PlayStation or Xbox in many years. Min spec for many games is 5 years old tech