Did I reach the half-life of my WRG3s?

The other day I noticed my tires telling me something. No, they didn't squeal, nor did the slip.

The wear indicator only displays a "4". Alas, the 8 and 6 are no more. It was the first time I have thought about getting a new set. I searched Nokian's website. Luckily, I am still in good shape. I have to keep my eye on the snowflake indicator. Once those go, I need to be looking for a new pair. 

The tires continue to gobble up the miles in dry,wet, and all types of weather in between. I firmly believe these will be with me for at least one more winter. The wear is even across the tire, no cracks, splits, etc. Simply a wonderful tire!