Who has an interest in cracking your https traffic to say, lemmy? If it’s a nationstate, they already have access to root private key certs and that attack angle will not be mitigated with “quantum” encryption. If it’s Capitalism, i.e. google-ads or whatever, then it’s a marginal utility issue. If they harvested some of your https traffic from 20 years ago, it’s pretty worthless as far as metadata for ad-targeting etc goes. I don’t really see what “quantum encryption” would gain you.