Since my role is to bring the nerd perspective here...
Cake--especially a layered cake--was a delicacy enjoyed only by the rich. This was because the other 98% of us had wood stoves, and it was nearly impossible to find and maintain the exact temperature needed to bake a fluffy, moist cake.
When electric stoves arrived and became affordable among the middle class (along with other
developments), every housewife began making cakes for every special occasion in the '50s! It was like we'd all become Rockefellers overnight!
Eventually, the novelty wore off and people came to their senses about how much better a pie made with fresh fruit is than any cake. (Well, that part's IMHO!)