I absolutely agree with the silliness behind "you've ignored the latest advances!" and I also know that the latest advances in research very often yield no advances in practice. I also agree that mocking other languages is usually a sign for having little experience with many project and team types, and with not being able to see the bigger picture.
But that doesn't mean that you can't discuss the tradeoffs, or that they're just subjective preferences. Someone who really understands Rust would never say that GCs are an anachronism, as they would be very much aware of the cost Rust pays for the ability to maintain safety when a GC can't be used. But that's not a subjective preference, either. A language like Rust knowingly sacrifices convenience and development speed to be able to target certain kinds of applications.
But that doesn't mean that you can't discuss the tradeoffs, or that they're just subjective preferences. Someone who really understands Rust would never say that GCs are an anachronism, as they would be very much aware of the cost Rust pays for the ability to maintain safety when a GC can't be used. But that's not a subjective preference, either. A language like Rust knowingly sacrifices convenience and development speed to be able to target certain kinds of applications.