Vitamins vs Painkillers

What it is

The argument is about how a category changes under a user rather than about what a product is at launch. A product opens as entertainment, and nothing is wrong if you skip it. After enough repeated use, its absence itself produces discomfort, so the same product with the same features is now relieving something different. What it relieves is no longer boredom. It is the discomfort of not checking.

Eyal's working definition of a habit follows directly from that claim: a habit is when not doing an action causes a bit of discomfort. He does not hang the argument on a single named case, making the point about the shape of habit-forming products generally.

In effect

The framing is useful to a designer and should be labelled for what it is when it is used. It names a real commercial dynamic, that a product can become defensible only after the habit exists, and it explains why founders are told a vitamin cannot be funded and then observe vitamins becoming very valuable.

The definition is where care is needed. Habit research defines a habit by automaticity and cue dependence, in the work of Wendy Wood and David Neal and of Phillippa Lally and colleagues, not by discomfort on omission. Discomfort on omission is closer to withdrawal, which is why the link from this framing to behavioural addiction matters, and why the same sequence Eyal describes as a design success is what Adam Alter describes as harm.

What it does not say

It does not describe a tested effect. It is an investor heuristic and a product-strategy argument, and no study is offered for it.

It does not supply a psychological definition of habit. Eyal's definition is a coinage and differs from the research definitions, and it should not be cited as a finding.

It does not settle whether the sequence is good. The same conversion is read as an achievement in one literature and as a harm in another, and that disagreement is the substance rather than a detail.

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