---
title: Stack Lock
description: "### Definition The fail state where vendor exit costs exceed the value of switching. The operator is trapped inside the stack -- cannot leave without paying more than staying is costing. ### Explanation This is the terminal state [Stack Drift]…"
url: "https://kb.jeffreysummers.com/docs/stack-lock/"
updated: "2026-08-13"
category: "The Operator's Dictionary"
---

# Stack Lock

### Definition

The fail state where vendor exit costs exceed the value of switching. The operator is trapped inside the stack -- cannot leave without paying more than staying is costing.

### Explanation

This is the terminal state [Stack Drift] and [Vendor Capture] build toward when left unchecked. A stack that accumulated through addition and captured pitches, never audited against actual need, eventually reaches a point where the switching cost itself becomes the argument for staying -- even when the stack is actively costing more than it delivers.

The operator caught in [Stack Lock] isn't choosing the vendor relationship anymore; the sunk cost of exit is choosing it for them. The only way out is treating the exit cost as a one-time tax worth paying against the ongoing cost of staying trapped, which requires actually running the audit [Stack Drift] never got.