Bottom line is it depends on the system. Edge3's, EP2's will deform if you look at them wrong. Edge, Lo Pro, have always been quality units, and adjusting a lubed system should never be an issue. And now they're using a new cast knife that is the hardest they've ever used.

usually players tweak the action instead of fixing what is more time consuming but is the real problem, usually trem angle changing, truss rod is too easy to adjust but too many are afraid to touch. Spinning studs up and down to compensate for everything else moving instead of correcting the real problem, is the problem. Once a guitar is setup and locked and how you want it, it's trem angle and neck relief that are the only things that should be kept in adjustment.

People simply assume that if the guitar won't stay in tune, it must be that the knife edges are shot. I can understand how someone inexperienced could jump to that conclusion, but it simply isn't the problem. The issue in most cases is the studs have become worn and are binding the knives. Replacing them and lubricating the contact points solves the problem. The other issue and one I think lots of people ignore in their fascination with "Golden Era" guitars is the anchors themselves becoming loose. Basswood is an extremely soft wood and once the anchors get loose, the trem will never be stable short of a more involved repair.