This will probably not help enough for asymmetric keys, and is unnecessary for symmetric keys. https://arxiv.org/abs/2603.28846 claims an attack runtime of a few minutes.

There are enough order-of-magnitude breakthroughs between today and scalable quantum error correction, that it makes no sense to try to to guess exactly the order of magnitude of the attacks that will be feasible.

Either you believe they won't happen, in which case you can keep using long-term ECDSA keys, or you believe they will happen, in which case they are likely to overshoot your rotation period.