1. You require opinionated workspace generators, detailed governance tooling, and a large plugin ecosystem: in such cases a different monorepo framework may be more appropriate.
2. Your CI and build times are already minimal: the operational overhead of configuring caching and monorepo orchestration may not justify adoption.
3. Deterministic, hermetic builds are a strict requirement: some organizations prefer build systems that emphasize hermetic, polyglot guarantees.
4. Your primary pain is dependency installation rather than task orchestration: Turborepo does not replace package managers such as pnpm or yarn.
5. You want to avoid platform-aligned tooling: while Turborepo supports a self-hosted remote cache API, much of the simplest integration is with Vercel.
Sources: Turborepo documentation and community discussions