Haha a self promotional blog post without any experimental data from a lab self-interested in the technology is somehow not persuasive to me.

There is no way to add entangled particles to an entangled photon state without new light matter interaction which may (and almost certainly) bring decoherence.

Ie to claim a good enough switch is possible is a claim demanding a ton of evidence, and there is none right now.

Ofc I would be thrilled to see it work! But explaining a scheme in back of the envelope fashion and measuring it are two vastly diff things.