> And another important feature of shared libraries is, that when
> some lib is updated, importing programs dont have to be recompiled.
> What's the Plan9 solution here ?

We recompile the relevant executables. The speed of kencc makes this
much less painful than you might expect. It also happens very rarely
on plan9 - I cannot remember the last time we had a "big" pull.

It also neatly sidesteps the issue that different
applications can need different versions of a single
shared library. This is a real problem on some OSs
(see 9fans passim).

-Steve