regarding editing, a good comparison between analogue and digital is the digital RAW file is in effect the equivalent of the old analogue negative.
with film, you took the negative and developed it into a print. This could be a straight print, but even then you've made a decision on paper, exposure and chemicals, or it could include dodging and burning, cropping, toning (and that's just black and white)
with digital you have more options, and each is more accessible, but a straight development to adjust white balance, brightness/contrast etc is little different than printing a neg.
Once you go beyond that then I can understand some peoples view that it's no longer a photograph (a view I disagree with, I would agree however that it's no longer a documentary photograph)
I sometimes do more than basic adjustments, if it suits the image, but never go as far as sky replacement unless it's a wholly composited image (something I'm not very good at)
As an example, this is heavily edited to achieve a "feel" I wanted, which I thought suited the image
ACWS_0892 by
Colin Ashworth, on Flickr
whereas this, whilst still fairly heavily edited, was restricted to basic functions of white balance, contrast, dodge and burn and cropping
John Rylands Library 001 by
Colin Ashworth, on Flickr