What I'm curious about is if the "leaky" vaccines are actually the cause for the amount of mutation we've seen in Covid in 2 years. Variants seemed to accelerate after vaccine rollout began but, I'm not remotely qualified to say they're related.
It is important to not forget the little details, and to avoid speculations based on broad statements (e.g. the vaccines "rolled out" and we got "more variants"). The vaccines started rolling out to very specific locations and we got variants everywhere.