Do you think cardano will over take ethereum in terms of tech with voltaire being worked on this year. Along with erc20 converter for easy conversion to cardano via ethereum. 
I've come across reviews like this several times and the answer is clear to all.Once again I will say that until whenever in the future it will be impossible for other Altcoins to be able to match or surpass ETH.
Even though the Altcoin has a good project in the future, it still won't be able to do it because ETH is the best Altcoin and has the 2nd top crypto position after Bitcoin.
I think only stupid people believe that Cardano or other Altcoins can match ETH.