I've read some very well informed critiques on HN. The general sentiment will always be super negative absent an easy topic or a clickbait headline which over simplifies a problem to tap into a commonly held feeling.

These sorts of hard questions about scaling it up into real life have been some of the most persuasive fusion critiques.

And the bit you tapped into about the whole detachment from the gov research world from making something they have to justify with hard $$ and all that comes with it are very legitimate.