As the MN habit is to start a new thread, then why on earth shouldn't it be off-putting?
Tweak verbiage to make it clear that a new thread is welcome, but only reanimate if (directly) updating the earlier conversation.
Other sites have other habits, which might be one reason why people think it's neutral/OK to do here. If they are put off by having it pointed out there is a different norm here, perhaps it isn't the site for them.