Anyone have any news on if any major miners have said if they are going to be switching away from BTC for the time being? As of 10 blocks past halving it doesn

Anyone have any news on if any major miners have said if they are going to be switching away from BTC for the time being? As of 10 blocks past halving it doesn't look like total hash power has decreased much. It'll certainly be interesting to see if mining power drops off in the coming month. Long term I'd love to follow something that simply warns when there's enough rentable or assumed dark mining power that 51% attacks on bitcoin mainchain is a realistic threat.