> the many decades-long standard of 15% tips The 15% standard supplanted the previous 10% standard somewhere in the 1970s and lasted to the early/mid-aughts de

> the many decades-long standard of 15% tips The 15% standard supplanted the previous 10% standard somewhere in the 1970s and lasted to the early/mid-aughts depending on where in the US one lived. I don't agree that ~30 years is "many decades-long". Further, that 15% itself was an uptick from the prior standard demonstrates that we're dealing with a moving target, for better or worse.