I think it is a cool feature, but I see some practical issues.
For me, encapsulation is a feature. I would like to see that a function uses a network call deep down, but only in a static analysis sort of way. So I don't want to mark something as potentially using a network until it actually uses it. And at the same time I wouldn't want to change every effect of every intermediate function just because I made something use an LLM or Redis cache.
It also seems that cross-cutting components such as observability instruments are just going to contaminate all functions with their need for memory, network, io, files, clock, locale, reflection, etc.
For me, encapsulation is a feature. I would like to see that a function uses a network call deep down, but only in a static analysis sort of way. So I don't want to mark something as potentially using a network until it actually uses it. And at the same time I wouldn't want to change every effect of every intermediate function just because I made something use an LLM or Redis cache.
It also seems that cross-cutting components such as observability instruments are just going to contaminate all functions with their need for memory, network, io, files, clock, locale, reflection, etc.