That's just my experience. If a customer pays for a new gizmo, they want the "latest and greatest". If it doesn't look latest and greatest to them, they feel slighted. I'm not saying it's necessarily rational, only that it's the way customers on average react. They don't always say it directly, but word gets around. I've seen it many times. Humans judge books by covers.
As far as old-looking sites like Ebay, if an Ebay competitor appeared with equivalent services and product choices, yet LOOKED fancier/stylish, Ebay would start to lose customers. Lucky for Ebay, no such site exists. (If they appeared, Ebay would probably spend on a visual revamp.)
Right, but it seems to me that an entire - and unbelievably rich - industry is moving along with “just my experience“ when it comes to UIs.
End users very consistently hate breaking changes, regardless design or functional.
True, but it's hard to get new customers unless your "art" keeps up with the Joneses. A revised product is still usually more similar to the last version than another vendor's product such that existing users will usually stick around because a same-vendor overhaul is the least of two evils to them.
Is that even true? Is there any survey showing that users consider those bad or old tech? Because with things like the reddit, ebay, paypal, gmail redesign, the common thing i ve noticed is that nobody asked for those.