Constructive.....not.
I suppose that would depend on who is commenting. Some people that like music and listening to it as an aesthetic experience, also have critical faculties for judging their equipment - these to traits are not mutually exclusive - though not always guaranteed to be found in the same person. I find many folks whose comments seem very constructive - they do not justify their purchases, they explain the reason for their purchase - it is not a question of the blind leading the blind, though it does happen occasionally on AGON -- you can usually tell the difference, with patience.
I suppose that would depend on who is commenting. Some people that like music and listening to it as an aesthetic experience, also have critical faculties for judging their equipment - these to traits are not mutually exclusive - though not always guaranteed to be found in the same person. I find many folks whose comments seem very constructive - they do not justify their purchases, they explain the reason for their purchase - it is not a question of the blind leading the blind, though it does happen occasionally on AGON -- you can usually tell the difference, with patience.