I always play missiles so I don't know but is it the same for all the follow on weapons techs? When I first saw that I figured it was just because there wasn't a final miniaturization or power tech you got that standard final one cheaper instead.
Having said that I'd love if all the 'final techs' had tiny tiny, but fairly expensive add on techs so the tree was effectively endless but very expensive to go beyond the end. That would be amazing when you max out the tech tree then annoyingly start to get 'more equal' opponents that you'd already out powered because your tech research advantage suddenly becomes useless.
