Do not buy ASICs for Ethereum mining, because Ethereum mining may end soon due to the change of the algorithm.
Explore the information about the Whatsminer M30S ++ and Bitmain Antminer S19J ASICs. They occupy a large share of the market for new ASICs and it is easier for them to find spare parts for repair.
Is ETH the only coin running on Ethash algorithm? I don't think so and also I don't believe that ETH pow is going away anytime soon, miners aren't seeing insane profits like before since ETH last upgrade which means that gas fee is more affordable than before
https://whattomine.com/calculatorsIn the search, write Ethash.
If you study these coins, you will understand that they are not profitable for mining even now.
Ethereum Classic will not be able to accept such a hashrate.
In the Ethash algorithm there are other coins running but their profit is ridiculously low like Pirl,UBQ and Music coin to name a few,you risk to go even in negative territory with these coins if you have expensive electricity.
Music coin has been operating as a token on the Ethereum network for about a year now. And many miners missed the migration and lost their coins.