Well, they might work, but they are far from OK.

    - An open source kernel module which talks with the card.
    - A set of closed source GLX libraries for acceleration support.
    - A signed and encrypted firmware which only works with this closed source driver package to enable the card.

Nouveau drivers are intentionally crippled with a special firmware which enables the card to show a desktop, with abysmal performance and feature set.

Nothing is OK about that.