Dynamic linking certainly has no technical advantages like lower memory/disk usage or faster processing. Its main advantage, which has been cited before, is that it forces cohesion in the Linux community.

E.g if an author of a program finds a problem in the dynamic library he or she is using, the problem is forced to be solved upstream, benefitting all users of the library. If instead static linking was the norm, it is much more likely that the author would just solve the problem for him or herself and the solution would never reach the wider community.

In the best of worlds, we would have static linking everywhere but the "social contract" of dynamic linking would be enforced just as strongly.