This isn’t about every website tracking you regardless. Chrome kept logging browsing information even in incognito mode.
To be more accurate: Google websites kept logging browsing information, even when using Chrome’s Incognito mode.
Ideally, a website shouldn’t be able to detect whether the browser is in private browsing/incognito modes at all. We’ve already seen news sites using the ability to detect private browsing to enforce paywalls for example.