[crizzlenizzle]

> Plain old files on the file system

…and accessed over SFTP.

I worked for a company in the health industry and one of the labs we integrated refused to call a HTTPS endpoint whenever a result was ready, so we had to poll every _n_ mins to fetch results. That worked well until covid happened and there were so many test results causing all sorts of issues like reading empty files (because they were about to be written to disk) and things of that nature.