The freezing of fries can and does make them better, keeps the inside fluffier after frying as the ice crystals blow up inside.
Even Heston Blumenthal freezes them [0]
[0] http://www.redonline.co.uk/food/recipes/heston-blumenthal-tr...
In what universe? Fresh peas are significantly better, and I'm not even sure that's an opinion as much as fact.
Edit: If HN had controversial markers, this comment would have one. I've watched the points on it go up and down, negative and positive, for the last hour.
Apparently frozen peas is quite controversial.
Added to the fact they last much longer, I can't see any reason to buy fresh (we're talking petit pois style, rather than runner bean style).
Fresh peas, on the other hand, cover a range from "I picked these myself just now" to "who knows when these came off the plant".
Heston freezes solid whole pieces of potato, In-n-Out likely uses whole pieces of potato, seasoned. McDonald's likely mashes everything up, blends it all with preservatives and flavour enhancers and forms it into fry-shaped pieces.
https://www.youtube.com/watch?v=IfZLWEAiixo
They are also dipped in dextrose for colour and Sodium Acid Pyrophosphate to reduce the graying from freezing them.
https://www.cnet.com/news/former-mythbuster-goes-on-mcdonald...
I think we generally get a better quality product from McD's, I did enjoy my In-n-Out experience when in Cali, but I can imagine it's a world different if the baseline fast food is poorer.
[0] http://www.cityam.com/207843/fry-hard-it-turns-out-mcdonalds...
In fact, I can no longer eat fries from anywhere else (McDonald's, Burger King, Wendy's, The Habit, etc.), because I know that they use fake fries.
At In-N-Out, you know that you are eating a freshly sliced potato, that was deep-fried, and served to you.