well, that is what all the fuss is about I think. You can take Bayern for example, they had both red-white striped kit and plain red kit as their home in clubs history. Later they added some blue on their kits and seems like fans liked those too. So in last decade or two they are switching between those designs as they all are part of their history.
But as you said, I don't remember seeing Inter home kit being anything else than blue and black stripes. And even this one is not different, just that those blue stripes are really not looking like stripes but rather some little details added so that kit wouldn't be plain black