Ask HN: Why don't we have a shared "libchrome" the way we have glibc or DirectX?

So you'd need somebody to build the tooling for that kind of resource-sharing and convince people to use it (think about similar prior waves where various toolchains became common practice for things like update-checking, installers, etc). And they'd basically have to be doing it out of love-of-the-game, because there's not really any money in it and any time it breaks people would be pissed.