The OP claims that employers don’t value the institutional knowledge that is built up by employeees. I can refute this from my direct experience, which, as I understand, is not atypical for a developer working at a startup. I worked for five years for MetaCarta, which sold geographic search technology, primarily to government agencies and oil companies. In April we were aquired by Nokia, which runs its own search eng…
Some companies do, some don't. Glad you were in a camp that does. I've known people who were at companies which didn't value that knowledge and would just cut cut cut.
And the management didn't seem to care; they would just hire more interns... who they treated better than the seniors anyway.
And honestly, the work sucked. It was almost entirely a crapware maintenance job, no engineering, and a staunch resistance to changing anything at all, even the clumsy, buggy, and inefficient Perl-based "solution" that the company relied on for around 70% of its catalog data.