Just wanted to share my 2 cents. I had KDSS on my 2012 Trail. I really liked it, but living in Ohio where it snows 2 inches and ODOT puts down 4 inches of salt and brine I know a few things about rust and rust prevention. Each fall and spring I pulled the KDSS cover under the drivers door and cleaned and then sprayed down with Amsoil Heavy Metal protectant. No issues. I am now in my 60's and retired and things I used to be able to do easiliy are now getting more difficult. Arthritis, and shoulder replacement have me pick and choose what I do. With that said I do not have nor did I want KDSS on my 2021 ORP. In my opinion having driven both the 2012 and the 2021 back to back and on separate days I did not feel the driving difference was worth the money and potential repair cost down the road. After speaking with several suspension specialists, I determined if I really wanted a KDSS feel w/o KDSS I could upgrade some components and get very close to the KDSS feel. Just my thought process and opinion. After driving the 2021 for a year I don't feel the need to upgrade. I don't know if Toyota upgraded the shocks or suspension on 2021's versus 2012's w/o KDSS but it does feel much more stable. Even my wife thinks so. Just an old mans opinion. Your mileage may vary 