This is why theres LN but yet there still lots of things to be fixed on when it comes to Bugs that's why its the main reason why it isn't really fully adopted or commonly used yet.
Comparing ETH to BTC? They are different on any terms but I don't really believe that ETH can easily replace up the King of all crypto in a short span of time.
Theres a possibility but we wont know on what happen on future.