We appreciate docs and advice created by the community. 
The auto-delete timer is rather indiscriminate, so it can be a double-edged sword. 
But the intent is to calve off the suggestion to change the doc into a separate topic so as to retain the history where necessary/useful. It’s an, um, ‘organic’ process so you may find some/many examples of where this hasn’t been the case.
Though we’re reasonably responsive if you spot something and think it should be changed/improved in some way.