[sandworm101]

Worse yet, some aspects of old recipes have objectively changed over time. Eggs are bigger. Staples like salt and flour is more homogenous. Our cookware is also different. Much of the stuff we get away with today on non-stick cookware required much more skill and attention in the past.

[MisterBastahrd]

Even recent recipes have issues as shrinkflation and corporate food chemistry have both changed pre-made boxed ingredients for specific recipes. A box of cake mix today usually yields a softer crumb than a box of cake mix from 20 years ago. It's also smaller.