No I don't, but I am sure you are an expert on everything. By all means, continue.
The question has been answered by others.
Inflation and the cost of capital is one answer.
But, read the other answers on the thread. There are some really smart folks here. But to assume that the way things were thirty years ago are constant is just not a practical way to look at things. Think about how you do everything today compared to thirty years ago. Has it changed? Is it more simple, or more complex.
The financial world rarely moves in a straight line.