RWBY’s not all that into killing off it’s major characters. We’ve only had one major permadeath so far. Sure we might eventually get more, I’m not discounting that, but it doesn’t feel as inevitable as some people seem to think.
A lot of people have begun to equate major character death with higher stakes in recent years, and I fully blame it on people's misunderstanding of a lot of famous stories with a lot of death, and oversaturation of edgy "everyone dies" stories in the first place.
It's also because people use a very broad scope to view their media, without actually taking the time to think about what kind of story they're watching, how it personally handles tropes and themes, and what the theme of it's story is in general. They'll look at Game of Thrones and see people dying, thus raising the stakes, and assume that any other type of media they consume that also has death does it for the same reasons and in the same way.
So you get times when people see Qrow's cell getting blasted open in the most obviously set up jailbreak moment the whole FNDM has been waiting for, and ask whether CRWBY just killed off Qrow because "big explosion + character I think will die = that's a death scene"
The reason I am so confident about none of the main cast dying is because it wouldn't make sense. And despite what a section of people would have you believe, RWBY cares very much about it's character arcs making sense.