>The version I've heard is that the firearm technology when the second amendment was ratified was very different than today and that makes it worth evaluating if we want to amend it again.

That's an even worse argument because it's seemingly trying to both to do an motte-and-bailey and strawman at the same time. The motte and bailey comes from seemingly trying to present as sympathetic of an argument as possible. I mean, who's against reevaluating old laws? Strawman comes from the fact that from all the 2nd amendment supporters I've heard, nobody thinks it should be kept because we shouldn't be second-guessing the founding fathers or whatever. All their arguments are based on how guns aren't that dangerous, or how it serves some sort of practical purpose, like preventing state oppression or whatever. Whatever these arguments actually hold is another matter, of course, but at least "the 2nd amendment only applies to muskets" argument doesn't rely on a misrepresentation of the 2nd amendment proponents' views.

You've reduced this discussion to meta-debate (again, it seems) and it's stifling productive conversation.