Who knows. Their target group is usually perfectly capable of installing an OS themselves. But Framework is also a popular hardware brand among Linux users, because their hardware is already built with Linux in mind. If you look at their forum, it does not feel like everyone is just installing Windows on their hardware.
I wonder how many would just do it for the extra discount and then use massgrave
Edit:
I went to watch their prices for the diy series
(Preinstalled, is +220 € for win 11 pro or free Ubuntu, can’t get win home edition if preinstalled)
Who knows. Their target group is usually perfectly capable of installing an OS themselves. But Framework is also a popular hardware brand among Linux users, because their hardware is already built with Linux in mind. If you look at their forum, it does not feel like everyone is just installing Windows on their hardware.