This is being wrongly treated as a binary choice of:

  1. Disable the behavior.
  2. Let it remain, do nothing else.

Meanwhile the actual problem is being ignored completely, which is:

  Form contents are discarded on history traversal,
  even at reasonable depth.

The correct solution is to do what other browsers have successfully implemented already:

  3. Retain form contents on history traversal.

That way people who accidentally go back, can go forward again and keep all their input.