Thanks for the link(s). To me, all but one argument in favor of original Reply-To seems very subjective. That one is:
If you reply to the list by mistake due to reply-to munging, you look like an idiot, or worse.
If you reply to the sender only by mistake, no harm is done, the mistake can be fixed.
Even this one is debatable, I don't know about the others but I have never got into situation where I didn't notice the mail is from ML and not a private one. Anyway, this is going very offtopic, so I'm helpful for this new information for me, I'm not going to change it then unless people start to complain.