can't he just replace the keyboard? I'd imagine that won't be too hard?

Did you miss the following parts?

    Given my past experiences with X1 Carbon laptops breaking outside of warranty and the frustration that comes with replacing their components, I decided it was time to look for a replacement.
    [...]
    There are also some other issues with the X1 line in general, such as poor CPU cooling and the absolute nightmare that is opening them up to replace parts or clean them properly.