I’m not sure how old you are or where you’re from, but I haven’t heard of 10% being an acceptable tip since maybe the 80s (70s) anywhere except rural areas. 20

I’m not sure how old you are or where you’re from, but I haven’t heard of 10% being an acceptable tip since maybe the 80s (70s) anywhere except rural areas. 20 years ago, it was definitely 15% minimum, but somewhere between 15% and 20% was very common (mandatory large party tip was usually 18%). Regardless, you are correct that the expected percentage has gone up over time, and that a non-tipper or low-tipper is hurting the wait staff when they don’t leave a standard tip.