> will dump their logic wherever it works with as little structure as it allows. It's a technical debt catalyser, and will make sure nobody feels at home in someone else's code. The community will pay the price in a year.

I don't want to downplay your concerns, but I will say that this is already a problem. Part of the goal with hooks (and I can't say if it achieves that) is to encourage the separation of a lot of state-interaction OUT of the components. Today it is much too easy (arguably it is easiest) to write a component that is basically untestable - basically a mini-application in itself, which is the opposite of good React design.

I'm hopeful that Hooks will help, and I think the original demonstration focused too much on state and not enough on other interactions external to the component, which is where the real pain today exists. I've not played with the alpha at all to have a feel for how realistic my hopes are.