It is possible to download a file from a set of providers.
Usability
API is not significantly different from that of a regular file download.
Reliability
If the network remains stable for long enough, the download eventually succeeds.
Performance
Performance should not be significantly worse than downloading a file over a mixnet. When downloading from multiple providers, performance might be better if mixnet allows.
Supportability
…
Security
The node downloading the file should not be linkable to the download. Note that the node that provides the file is not anonymized here.