First they ignore you: it was the case when Darktable was not as powerful as it is today
Then they laugh at you: we are discussing about this on this post…
Then they figth you;
Then you win.
With commercial softwares there are always many reviewers who bash other commercial softwares in order to promote their products.
For instance, I am bored to death to read on the net articles with a “neutral” photographer who suggests in his blog to dump Lightroom in order to adopt Capture One…
EDIT: I have never tried Lightroom. I am a happy RawTherapee user.
EDIT:
IMHO, to be fair, you have to admit that this guy has a point when he says that it does not make any sense to propose a software to a photographer only because it is free…
On the Net, you often read about some users suggesting to dump Photoshop and adopt Gimp because it is free. If they are “geeky techies” they often precise you can even download the source code as a bonus…