From later in the article:

> MD5 is considered a weak hashing algorithm these days; we use BCrypt, which is stronger.

Also, technically bcrypt is not a general hash algorithm, but rather a password-hash construction. Where SHA1 and MD5 are primitives that can be used in arbitrary crypt constructions, bcrypt is already a construction specialized for passwords. You wouldn't (or at least shouldn't) hash a file with bcrypt.

SHA1 too for that matter.

Other members of the SHA family are still fine to use.