On my t6, I had my phone in a cradle, and used that for nav. Now on the 6.1 it’s on the dash screen, I’m well happy. Mine is a work van/mobile workshop, that I lease, So adding options is big money, that I’ll never see again. Different story if you buy, then sell on/ use as your ‘car’ etc. I go for things like, big wheels, side bars, roof rails, I’ve swapped from my 5.1 to 6 and now 6.1.