In a recent comment exchange on ELU.SE, a Japanese man (my senior in years, and a "guest" in the forum whose questions I had answered regularly for some time, but not much lately as I have been scaling back my participation there), said in his comment to my response:
I felt obliged to respond in kind with
and that is how I replied. But it just felt a little strange in a comment-chain discussion. What do you think? Might こちらこそ or something else have been better?