[rkagerer]

It's more important to have people who actively "own" each piece of the infrastructure, and are intimately familiar with it, the rationales, the tradeoffs, etc.

Then when new knowledge/technology/idle cycles come along they can take advantage to update/refine it in sensible ways.

Often the sensible way is "leave it, it works fine". But there's a big difference between arriving at that outcome via ignorance vs. deliberation. Too often management doesn't recognize the difference, but the former as your state of affairs will eventually lead your stuff to rot.