[to3m]

Requiring the programmers to keep their changes to the library open is one aspect of keeping the software free; requiring that the end user be able to replace the library with a different one is another, and one that the FSF seems keen on maintaining. Personally, I agree that wider-spread usage of the libraries would be better than the current rather doctrinaire stance - but I assume the FSF sees the LGPL's current emphasis on end-user freedom as contributing more to the GNU goals than wider-spread usage of the libraries would.

In the meantime, there's always the MIT licence.