[Cthulhu_]

Maybe, but the end user of a browser based application (what this post feels like it references) deals with regular files served over HTTP still. Its source may be S3 in the end, but ultimately it's webservers and files, be they self hosted or one of the major content distribution networks' servers.

And that's absolutely fine, it's simple, highly optimized, standardized, etc. S3 blobs aren't and except for very specific use cases I wouldn't use it for serving files to end users.