In my opinion, and only my opinion, the single biggest failure item in the Cub Crafters lineup is the Acme Aero shock causing the most financial damage and contributor to the most accidents. This is probably why the XCub changed the landing gear design moving away from these shocks. I do have a mechanical engineering background and what stands out to me as two weaknesses in the Acme Aero design is the attach point at the top using the shock casing material as a mounting point instead of a stronger metal such as the TK1's do and the extreme extension of the shock strut causing a very weak point where the strut meets the shock itself if it is subject to any lateral forces. Again, a better design in the TK1. Now it seems that Acme has the better shock design which is why people choose it, again, this is only my opinion. So you either choose for the shock effect or the strength of the entire assembly. Acme with a better shock and TK1 with a better and stronger design using steel at the mounts and shocks in between.
As a pilot we have to know the weaknesses of our airplanes whether it's an aerodynamic issue that needs attention or a structural issue that pilots have to be aware of. If using Acme's know the limits of the shock design and handle accordingly but this requires TRAINING and EDUCATION and I think this may be a contributing factor to some of these items as cub owners like me have little TW experience at entrance and the manuals don't have bold face sections pointing out concerns. I may have several thousands of hours of flying and 30+ years of it but it doesn't qualify me as an experienced TW or cub pilot so it is very important to be aware of and be trained on the weak points to avoid these situations.
A friend of mine compiled the accident data on E/FX's and SS's. SS's have obviously been around a lot longer but the trend is they are nosing over far more often, you'll find a lot of SS's on their back in accidents. I'm not privy to share his data, maybe he will at some point but if interested just go through the NTSB accidents for the CCX and CC11's and see what you determine.
People have confirmation bias swearing by what they use which can cause them to overlook the flaws when compared to others. I have zero experience at this point and am only doing research to make a decision of what goes on my plane as I own neither and want to make the smart choice of what goes on my very expensive cub (FX3). I really want to put TK1's on but there is one report that outlines crosswind handling in a comparison test on the CubCrafters forum by John Hodges I believe that concerns me a little so I will likely go with the Acme's knowing I have to be extremely careful landing them and also I will add safety cables for my build. I still have plenty of time to be more educated on which to choose, I see many of the Flying Cowboys folks including Mark Patey choosing TK1's which is telling. My research continues and my ears are wide open listening to all of you to take it all in and learn from you.
Airplanes have to have robust gear as they obviously take the highest stresses and there are conditions that simply happen that the gear has to handle. A weak component is something that needs careful attention and not an excuse. I believe Acme's are getting certified so that will be interesting to see if their history becomes a problem as they have quite a few accidents on their record which of course blame was placed on the pilot. I hate seeing pilots blame themselves because they stalled from X feet. The drop test by Acme is irrelevant in my opinion, way too low.
My $.02.