Move fast is incomplete advice. Speed is valuable when it brings reality into the conversation sooner. It is expensive when it turns an uncertain judgement into a commitment the company will spend years trying to undo.
A prototype, a pricing test, or a new piece of language can usually be reversed. A co-founder, a cap table, a foundational data model, or a promise made to the market cannot. Those decisions deserve different clocks, even when they arrive in the same urgent week.
Young companies often invert the pattern. Visible, reversible choices attract long debates while consequential ones pass quickly because they arrive labelled as opportunities. Naming the cost of reversal before making the choice restores the right proportion. When possible, build a smaller version of the decision and let reality press on it first.
A strong company is not fast at everything. It is fast at learning and deliberate about the commitments that shape every choice after them. Move quickly where you can return. Slow down when crossing the line redraws the map.