Every time my Windows gaming PC updates it nags me about setting up backups to OneDrive.
I cannot install Windows without a Microsoft account unless I apply work-arounds.
It constantly offers Office 365, even adding dummy icons to the start menu.
There are adverts on the login screen.
To be fair I installed Bazzite there, but for a laptop I cannot find an equivalent device at the same price point even ignoring the need for linux drivers.