I think it can be quite hard to make a jacket which won’t sag too much or have a weird weight distribution with things in the breast pocket. And you may get a v

I think it can be quite hard to make a jacket which won’t sag too much or have a weird weight distribution with things in the breast pocket. And you may get a visible lump depending on the size of the item and fit of the jacket (again large flat phones against a not-flat chest doesn’t help, and neither does the trend for clothing to fit quite tightly). That said, I agree with you that internal pockets in jackets are great (though obviously it can be harder to access the contents once you have taken the jacket off). I do also have a jacket with a pocket on the upper sleeve. It’s tiny and weird and basically useless and I’m not really sure what it’s for (credit card? Tiny MP3 player? If it were a skiing jacket then I might guess it was for a lift pass but it’s definitely not a skiing jacket and it’s a weird manoeuvre to try to get your upper arm to a reader at waist height) though sometimes I will put my keys there because their lumpy shape makes them uncomfortable in pockets closer to the skin and I rarely need to access them