It's totally nuts that the adjustable seat - and back folding feature for the passenger seat - are not standard. They would cost Fiat next to nothing and be a real selling point.
When I tested the T/A it had the adjusatbale seat. The salesman needed it set low as he has a long body, whereas I needed it pumped up because I have a shorter body. And anyway I detest sitting low in a car. There isn't much difference in our height by the way and our eye level when driving was identical.
I have sat in a Panda with a non-adjustable seat and I found it a compromise, and not in a Goldilocks way either, it was too low for me.