Notion
Flexible docs and databases users love; leaving means migrating templates, permissions, and team workflows—sticky by design.
Lock-in Stage 2
Users are retained through switching costs, data, network effects, or ecosystem dependency.
Notion’s surplus is real: fast iteration, templates, and a flexible model. The switching costs are organizational—wikis, databases, and embeds accrete over time. Business tiers and AI add extraction vectors, but the headline is stage 2 lock-in for teams who’ve built on it.