Classic white borders. Classic photography. Classical music. Definitions and distinctions. 21st century literacy (if I dare call it that) is a different world... Do do they all speak perfect English up there in the Adirondaks? Sure as anything, they do not down here in Tasmania, in my old age I may compile a TTasmania -English dictionary for the rest of the world to understand us.
Before 1997 when the internet took over and began its wanton destruction of the civilised world, most people had photo albums..Photos were either pasted on the pages (terrible for us when we want to scan them, but there you are) or stuck down at the corners with - what were they called? Photo stickers, I believe. Me, I think the white borders were to ensure the stickers didn't intrude in the image, and also for better handling without getting fingerprints on the actual image.
Photographically (oh dear, here we go again) I tend to print borderless (ditto) up to 5x7 with my 35mm images, as I believe small images need all the space they can get and look better sans borders. Larger, I allow for borders. My 120 prints are 6x6 on 5x7 with plenty of white space around them. These look ultra good when displayed and they sell quite well, so I must be doing something right.
As the natives in these parts would say, them's just me thought's...