You are correct. IPFS attempts to address this issue by giving the asset a hash, so if no computer/server connected to the IPFS network has the asset, and you

You are correct. IPFS attempts to address this issue by giving the asset a hash, so if no computer/server connected to the IPFS network has the asset, and you the owner have it, you could re-upload it to an IPFS server or join the network using your computer and the link will work again.