The study didn't really show that. What it did show, is that in this particular study there was no strong effect either way and there is really no way to generalize from the results. See in particular the details on what made the agent stumble, it was things like "cargo repeatedly gets invoked with the wrong arguments" - nothing to do with functional or static, just ecosystem idiosyncrasies and trivial differences.

Well, it did show you probably shouldn't use assembly, but that's about all it showed very strongly.

And of course it also showed very strongly that you should not base any choice-of-language decisions on single studies.