The running time of the CD-ROM was designed to play Beethoven's 9th symphony in its entirety. You would have thought Apple would plan the battery life to allow you to watch all of Avengers: Endgame, or maybe Oppenheimer, without pausing to swap the battery.
If you look at the historical ratio of income to the price of computers we're literally orders of magnitude wealthier. You can't just pick one data point and blast off.
You're ignoring interest rates which allow the overall price to go up while keeping the monthly payment the same and the fact that houses have gotten a lot bigger over the decades [0].
True, but the price will come down. The early MacBook Air's were also super-expensive, rich-early-adopter-only pricing, and now they're the mainstream product.