As a converse, its very "nice" to have programs in /sbin and some in /bin to be statically linked.

And when I say nice, I mean absolutely essential. Ive had glibc go south before... And then nothing works. Its a "hope you can boot with rescue media and hope and pray the old glibc is in your apt/rpm cache".

But having the rest of the system being dynamic linked makes a great deal of sense for the reasons you stated.