I suppose it's probably a case of "if it ain't broke then don't fix it!"
However I recall from my B737-200 course with Boeing in Seattle in 1980 that a few years previously Boeing were concerned about the numbers of their aircraft which were being written off by, shall we say, "third world airlines".
They decided to make certain items which were optional extras a mandatory fit - i.e. autobrake, autospoiler etc etc. Quite simply if you bought Boeing then these items were part of the basic aircraft.
Boeing also insisted that where the type was new to a company their training pilots would do the initial conversions - in other words this "package" was all part of the "sale" of the aircraft.
I believe the result was a considerable reduction in hulls being loss as a result of overruns etc.
Whilst there is no substitute for good airmanship it surely makes common sense to incorporate such features into modern transport aircraft.