Run/walk is not only an entry level way into running (couch to 5k anyone?) but it's a way many of us choose to run most of the time. This sport is not entirely about crowns and speed, some people run for the sheer enjoyment of it and want to record each activity in its true form. I think a huge volume of Strava athletes would welcome a run/walk option in the app. At the moment we either have to choose run or walk, neither of which are 100% accurate.