What does a modification of "170°" signify?

A modification of "170°" signifies "extra hot" because it represents a temperature higher than the standard serving temperature for many beverages, which typically is around 140-160°F for hot drinks. When a customer requests their beverage at 170°, they are indicating a desire for a noticeably hotter drink than usual.

In contrast, standard hot temperatures would generally fall within that 140-160°F range, meaning the request for 170° is indeed for something above and beyond the norm, hence describing it as "extra hot." This adjustment caters to those who prefer their coffee steaming hotter, enhancing the sensory experience of the beverage.

The other temperature modifications mentioned do not fit this context, as cooled or room temperature drinks would not typically reach the 170° mark, thus not aligning with the idea of increased heat.