Does white interior get dirty, stained, yellowed, blackened, or oxidized easily?

Yes, if you maintain it regularly, it won't be a problem. To keep it simple, you can get a car wash card and go once a month. 🌹

I guess you didn't listen to your wife and chose the brown one because you can't guarantee you'll never wear jeans, right? Especially in Chongqing's humid and hot climate. Even in Australia, I wouldn't dare to choose white, even though it looks nice.