Those answers are both dubious and very outdated. At the time they were written, the most mature and widely available solution for blob storage was the filesystem, which has its own set of shortcomings for that use case. This is no longer true, and that alone frankly makes those answer obsolete.

Then you have the fact that those answers are ignoring a lot of facts. The answer you referenced from Bill Karwin talks about mutating blobs. This isn’t a reasonable design pattern at all, you create a new blob and update the reference. The downsides to storing blobs in an rdbms are so numerous that you’d really have to have a very strong justification for doing so, and I’m really struggling to think of any that are actually technical.