I was also concerned with people reporting memory consumption/leak issues, as I’m planning to have lots of subscriptions. I don’t know haskell well enough, but from the outside it does match the symptoms of having dug themselves into an architectural complexity hole, which I assume is much harder to navigate with unorthodox tooling and practices.
Im still rooting for hasura, I like their way of making things dumb, simple and without too much technophilia for its own sake. They genuinely want you to focus on your business problems instead of blasting you with novel and overengineered concepts, like others do.