I think there's a lot of misunderstood hype about what quantum computing can actually do.

Don't get me wrong - for certain problems, it will be orders of magnitude more efficient than traditional computing, and this is very cool stuff! But, it's not magic - that's my bigger point.

Maybe somebody will come up with an algorithm in the future for some of the problems that I mentioned, and maybe QC will only be used to solve a small piece of that algorithm (that's its role even in the Shor algorithm - you still need a classical computer for a lot of the factoring work).

But, given the information that I've been able to find today, I don't fear that SHA-256 or EC DLP will be broken by QC any time soon. Time will tell!