If that is the case as you said ETH should have taken over now.
but the fact is btc is still strong in the lead, we will never know the extent of development that will occur in altcoins, but still the one who will be at the top is btc.
ethereum is still having trouble taking over rank from bitcoin, you also know that it seems impossible to be number one because ethereum's currently circulating supply is too much so when the price becomes expensive there will be a hard dump, if this is the case then ethereum can be say you have no chance to beat bitcoin.
regardless of the total supply, eth will not be able to beat btc, although as op said that eth development has developed a lot and beat bitcoin which is only used as a means of payment, but the demand for bitcoin will always be greater than any coin.