Sounds like overkill. Quantum is a premature concern, but if there’s really that much paranoia why not use PQC like ML-KEM instead of rolling this strange thing?

I'm not sure what you mean by "this strange thing" as the article promotes AES128 for symmetric encryption and explains why it is dumb to move to "post-quantum" for that use case.

I think there are too many unknowns to bet it all on one horse.

So, if we have to change all of our infrastructure due to a supposed quantum computing threat, I'd go with HybridPQ for asymmetric encryption.