In my mind, it was never a hype. It was something they wanted hyped but - and of course I can only speak for myself - I never was sitting on the edge of my seat. It's the technology version of new wonder drug could cure cancer. And then you read the story and reality dwarfs the vision quite quickly. I thought blockchain was a much bigger deal hype-wise. And that had all the oxygen drawn out by so-called AI.
Quantum computing is a threat because if it became mainstream usable today it could render the entire password based login system hackable in a flash, probably breaking the internet. There are two things to consider though. It isn't usable today. And the big companies that do a lot of the research have a vested interest in not breaking the internet. So we see passkeys today and other forms of authentication will follow before QC could become a reality - if in our lifetimes or if ever - who knows.
I don't know why you're deflecting, this wasn't about me. I just pointed out that if you're still using reddit you're not a pure citizen of the fediverse, which is what the redditor was asking for. And, as the other lemmymite pointed out: you're not going to find many pure fediverse bears with honey on reddit. This is about logic, not your or my dedication to the spread of federated social networks.