If qbits double every year, we’re at 20 million in 15 years. Changing crypto takes a very long time on some systems. If we’re at ~20000 in 5 years, we better have usable post quantum in place to start mitigations.
But I’m not convinced yet, we’ll have those numbers then. Especially error free qbits…
Many bcachefs patches are from other contributors. IDK, but I guess the meat is still from Kent. But he claims to be in te process of hiring additionl devs.