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.
- When you open the respective apps they ask if you want to try the free trial.
- Apple once abused the Wallet app to send notifications about a theatrical release.
Other than that I'm not sure what the fuss is about.