I think part of the goal of simplifying (and decluttering) is to discover the things that you truly love and release the rest. As far as I am concerned, if you are USING things and LOVE them, then there is no reason to get rid of them just for simplification purposes. JMHO
On a practical level, I really love making my own reversible items in order to get the flexibility and change I crave while keeping the "stuff" to a minimum for a streamlined home life.
I was seriously thinking about this today, we still haven't put up curtains in the living room from when we moved, and will do coordinating throw pillows with that as well when we decide colors...The rest of the living room is beiges and browns, and I am torn between red and or yellow for curtains/ pillows, OR purple (eggplant) and or green (sage) for curtains/pillows. I was fantasizing this afternoon about sewing curtains that are red on one side, yellow on the other (same with decorative pillow covers, though probably that would be one color inside and one color outside if that makes sense), and then a seperate set with eggplant one one side and sage on the other. Then I wouldn't have to decide. LOL.