hey all, i'm trying to figure out a bit about structuring subscriptions which i wasn't able to find an answer to in the docs. now, i fully understand the difference between layer 2 and layer 3 subscriptions, but what i don't understand is whether or not i am allowed to have multiple layer2 subscriptions, or multiple layer3 subscriptions, or whether it's better to just decompose those things using functions. e.g. i could have a bunch of layer2 subscriptions which consume each other, each being very trivial. then i could have a layer3 subscription which does a lot of computation, which is also consumed by other layer 3 subscriptions which do even more computation based on its input. is this a common practice, or would it be better to "compose" these things using functions, not subscriptions? i assume it's mostly about the overhead involved in managing complex subscription hierarchies