Yes, whatever size limit is on the blossom server will be there too. It's not really optimized for large files.

The preflight exists and you can read the number yourself, but it needs a signature. BUD-06 is `HEAD /upload`: you send X-Content-Type, X-Content-Length and X-SHA-256, and the server answers 200 or 413 with an X-Reason. Anonymous it just returns 401 "Missing Blossom Authorization header", so you ne...