Is there a threat from new GPUs blocking mining?
For example, this video katrta with the addition of LHR.
EVGA GeForce RTX 3070 Ti FTW3 ULTRA (LHR)
The LHR = Low(er) Hash Rate. I know these cards mine ethash (ethereum) at lower rate but I am not sure about other algos.
So yes, a card that has LHR on it will not mine as good as a non LHR card.