The original floor has been there since the first T5 California. I haven't heard that this would become sticky, but perhaps others have. Didn’t know either they are rubberised.
The intention should be that they are durable, but they are easily scratched and dirty and although they can be scrubbed hard, I don't find them that easy to get clean again. This is my experience. I also use the cali almost every day and regularly insert (and remove) the 5th chair. This does not contribute to keeping the aluminum inserts of the rails scratch-free. Our cali is used for daily transport, container park rides/ communal waste recycling (with thick large pieces of cardboard in it for protection) and traveling with the four of us. Personally, I like the wood effect floor better, but I didn't order it and I bought an after market carpet and thought I would dress it up a bit... the carpet hangs in the garage: I almost never put it in our Cali.
If I had to do it again: I would order the wood effect floor. I think.