mclarens history in the former super series category was that each subsequent model was faster then the previous one . It was usually incremental until 720 annihilated 675 . Then it went back to incremental with 765 . The 750 will be the first one that will be a little slower then the previous model (765). I haven’t heard one sales person or mclaren personnel say that 750 will be faster than 765.Same reason Porsche hasn't made a faster Cayman than 911 even though they easily could...
I had 765 and getting 750. I know many others who are adding 750 to go along with 765 and many others who had a 765 previously who are getting 750.
most supercar owners don’t look at upgrading decisions with supercars like they do with regular everyday cars . (Ie; is it better then what I currently have).