I've never understood why people annotate edit
conflicts "(EC)" on the
talk page. What is the reader supposed to do about it?
I only do that if my comment would seem somewhat out of place coming
after the comment it conflicted with but I don't want to rewrite my
comment to take the other comment into account. The most common case
is simply when I conflict with someone that's saying pretty much the
same thing as me. It would seem odd to just repeat what they've said
as if they hadn't said it but I may still want to post my reply, for
example, it may contain a bit of extra information, but I don't have
the time or inclination to rewrite it to just include the parts that
haven't already been said.