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Just a noob question here. IPFS doesn't guarantee that any data stored in it will be available for retrieval in future (unless lots of nodes want to cache it).

Why will anyone want to use IPFS for data storage without an availability and latency guarantee?

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The low level answer is that you can pin content to the cache so it won't be evicted: https://docs.ipfs.io/guides/concepts/pinning/

However, it seems like something that would need clever UI integration to really solve the problem. Any user oriented actions like github starring, reddit upvoting/saving, browser bookmarking, etc. might need to also do a pin?

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