Not sure if this is an apt comparison, but I like to think that the allocator is a good precedent. Similar to the async runtime most software needs one and mos

Not sure if this is an apt comparison, but I like to think that the allocator is a good precedent. Similar to the async runtime most software needs one and most developers don't care much which one they use and are happy with the default allocator. Another similarity is that both are not just some ordinary old library but required by language features. We also usually don't use multiple ones in a single application. Still we allow the developer to choose an allocator or bring their own one.