Only if you measure the life cycle starting from the initial release.

Windows 10 dropped out of support only 3 years after its successor (Win11) was available; when Windows 8.1 still had 7 more years of support after its successor (Win10) was released.

There's a lot of users who never upgrade windows but instead just get whatever is the latest whenever they buy a new computer. If these people bought a new computer every 5 years, they were always fine in the past, but now for the first time run out of support (because Win10 was "the latest" for an unusually long time period).