Relax, there is no attack on you for getting less miles per tire than others. Yes, you agreed with my mentioning the Kuhmo is known to be less grip in the wet and my mentioning it is based on face to face discussions with people that rode them and other posts here. We have never had a Kuhmo installed on our machine simply because it does rain often here.
As I mentioned, your name often comes up in regards to tires wearing quickly. It is no lie that many times your mileage is less than what others get, however, as you mentioned you are certainly not a typical Spyder user.
I would be curious though to see, if you track or log the miles that are pulling the trailer vs no trailer. I never posted my opinion that possibly pulling the trailer has an impact on your lower tire life. Also, when you pull the trailer, if that is a factor to the tire life, any idea of how much payload weight you place in the trailer?
In regards to what tire is best, each owner leans towards what parameters that use to decide. Myself, I insisted the tire had a directional tread that was symmetric left and right of the tires centerline. I wanted a performance tire with more grip and good ability to shed water, I preferred a 4 ply sidewall for less sidewall flex when cornering. Many tires had this possibility, some of the tires I considered are no longer readily available. The S.Drive was reasonably priced, a high quality tire, and based on others should see reasonable miles before worn out.
I don't get worked up over a person running any tire they prefer, it's all good if they are happy with it. I share honestly what I have learned or experienced and let others decide.