We would like to facilitate smooth transition from current CIDs to future CIDs from js-multiformats. Plan is to deprecate certain properties and uses that would produce warnings linking to migration guide.

As users often get CID from other APIs e.eg const { cid } = await ipfs.add(...), they do not really have a way to update, therefor it is instrumental to put warnings in place to create a path for migration as opposed to a clean break.