KV

Workers KV is the storage product I recommend first: a global key-value store with an API you can learn in five minutes. Reads are fast everywhere (hot keys are cached at the edge), writes are cheap, and the free tier is generous enough for real projects.

You do need to understand its eventual consistency: a write can take up to a minute to appear globally. That is fine for configuration, feature flags, cached lookups, and other data where some staleness is acceptable. Problems start when people treat KV like a database.

The one missing point covers the per-key write limit of one write per second and the occasional surprise for someone who missed the consistency model. Within those limits, KV has been boringly reliable for years. That is high praise for infrastructure.