I haven't gotten a post-flight survey email regularly for at least three years now.

Seven years back, I used to get them every single time. Primarily as a domestic leisure traveler. (1K to Gold to kettle)

Now that I am an international business traveler (Plat to 1K, depending on the year), I never get a survey. I mean never. Which is a bummer, because by and large I have had very good experiences, and some truly stellar ones.