Solana is a good coin and it develops very well. I think it deserves to call as the next ETH, but I am not sure if it really can replace ETH. ETH is still a unique altcoin, no altcoin is the same as ETH. It is always in second place on CMC table, difficult to overtake by others. With the good popularity of ETH, it seems no opportunity for Solana to overtake it now.