If you had a Performance Pack what would you do with it? No one has said what. Unless you want to drive like a maniac around built-up areas where most of the sharp corners are, that is.
As for the folding mirrors, I have them and they're cute but in the GCC parking spaces are so generous you don't need to fold the mirrors in. I use the mirror fold-in as confirmation that I've remembered to lock the car before leaving it anywhere.
Parking spaces are generous, agreed. But that doesn't necessarily mean everyone knows how to park within those spaces. I've had one experience where the driver's side mirror had been properly damaged on my BMW after which I made it a point to fold them in every time. Had to order replacements from Germany through the local dealership which took about 2-3 weeks.
It's not an absolute must have, but given my experience I'd prefer having them for peace of mind.