Comment by win311fwg

Right, Rust tells us something important: How the data was packed pre-optimization. This is useful information as, at least those with some familiarity with Rust, will have an understanding of what is being replaced.

You wouldn't be able to reasonably use something like "Replacing an Enum with ..." because, especially where enum in Rust means what other languages call sum types, the data representation can be anything. But even the more traditional use of enum isn't defined by any particular data representation. The whole point of an enum is that any value used in implementation is treated as being opaque! Whereas in this case the value is significant.

I mean, you wouldn't be able to no more than you could replace the title with "Hey you, yes you, read this". Which obviously you could do. But it would be a poor title as you wouldn't be able to figure out what the article is about. This title is great because you can predict exactly what the article is about before reading it. I'd even go as far as to say that this is one of the better titles I've seen on HN in a long time.

Granted, it does require technical familiarity to be able to grok it. I can appreciate those who have developed irrational feelings for an inanimate tool aren't coming with a very strong technical background, but who cares about them? The intended audience is clearly technical folk.