Probably because a quantum computer that can actually factor a large enough prime is between 10-30 years away. The technical challenges are... substantial. The

Probably because a quantum computer that can actually factor a large enough prime is between 10-30 years away. The technical challenges are... substantial. The article mentions NIST’s effort toward a post-quantum encryption standard. Hopefully, a few decades from now, these algorithms will be well understood and in widespread use.