I will relate personal experience and real-world results vs. expressing an opinion that our transmissions will be destroyed by a fluid/filter change.

I performed a filter & fluid change on my 2011 35d with 100,000 miles and I bought the pan/filter off of Ebay and the pentosin fluid at a local auto parts store. There is no evidence of any transmission service being performed previously based on the 1-owner maintenance records from his dealership. I bought it at 90,000 miles. After the fluid/filter change I also performed a DPF/EGR delete with ECU reflash done as per my other posts.

Within 1 month of all of this in June 2015 I pulled my 5000# utility trailer from Florida to Alaska and returned with no issues. I now have 133,000 miles on the X and have never had a transmission issue. I have also pulled my M6 from Mississippi to Wisconsin on a trailer dolly. I have definitely stressed the transmission in the last 33,000 miles and it's going as strong as ever after the fluid/filter change.

I will change the fluid again at 150,000 miles and the filter/fluid at 200,000.

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Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out and loudly proclaiming: "WOW! WHAT A RIDE!!"

2007 M6
2018 Chevy 2500HD Diesel Alaskan Edition
2011 X5 35d
1972 Chevy K20 4X4
1972 Ford F-600
1959 Chevy Viking 60 Dump Truck
2015 CanAm Outlander XT 1000