In response to my entry on zero-G in Pirates, Author noted that problems with zero-G are pervasive and pointed to an example in Rocket Girls (and noted that he's learned not to be bothered by it).

For me, Pirates is different from something like Rocket Girls in two ways. First and most important is that the zero-G mistakes in Pirates are so obvious that I've actually noticed them. I am not an alert watcher for technical details; I'm generally happy to get carried away without worrying about the small things (and the zero-G issues in Pirates are a small thing). It takes a fair amount to make me go 'wait, what?' while I'm actually watching the show. Zero-G in Pirates managed.

(I never noticed the zero-G issues in Rocket Girls, for example.)

Second, using zero-G is an actual setting choice in Pirates. Something like Rocket Girls intrinsically requires zero-G; you cannot have a modern era show in space with helpful artificial gravity. But artificial gravity is a common cliche in future space settings and Pirates could have used it without anyone blinking. When an anime does something through choice instead of need I generally hold it to a higher standard.

(For example, if an anime includes a generic camera I will ignore unrealities about it that would irritate me if the anime is clearly trying to show a specific camera but getting it wrong. You could phrase this as 'if you're going to put in details, get them right'.)

PS: note that Author is in fact more technically correct about the situation than I am. He's using the correct technical term 'microgravity', where I've gone for the slightly inaccurate pop culture label 'zero-G'.