[zkry]

From reading this, it sounds more like a management problem more than anything else. For example, retention goals should be such that all a companies experts (at anything, not just language) don't evaporate overnight and hiring goals should be such that experts are retrained and re-hired.

I think the analogy is also off a bit. I't be more apt to say a good surgeon should be expected to use electrosurgical units from different manufacturers, which is a completely fair expectation.