Not the original commenter, but I totally agree with you -- no one needs to justify free software at all; the more the merrier. I do think that there's somethin

Not the original commenter, but I totally agree with you -- no one needs to justify free software at all; the more the merrier. I do think that there's something to be said for clarifying why one might use one over the other in a space with multiple options or one clear winner (which I think Calibre is right now). Offering some improvements, problems that are fixed, etc. explicitly could help users make a jump or understand their options better. That's absolutely a nice to have, though -- free software for the sake of free software is excellent, and always justification enough.