Why not always use enctype=“multipart/form-data”?

Question

When building HTML forms why do we not always use enctype=\"multipart/form-data\"?

Answer 1

Mulipart implicits that we are going to use different mime-types. For example, sending a binary file, you will have one part with the x-www-form-urlencoded part and the other with the octet-stream. Most of the times what you send is from the same mime type.