re^^ at the bottom of the forklog article is a rebuttal from Adam Back https://forklog.com/en/adam-back-dismisses-quantum-threat-to-bitcoin-as-overstated/ putting things in better perspective. He puts the timeline at 40-50 years away before QC's can be scaled up enough to crack RSA256 encryption. Given the pace of (very incremental) QC advancements that fits my guess as well.