Dash is currently ranked 176 and with a price of 25 dollars, Ethereum is ranked 2 and its value is more than 3,000 dollars. Maybe Dash was also popular in the past but now the proof is that Ethereum is more famous and liked by many communities.
I also don't know much about the advantages of Dash, but I only saw a glimpse that Dash was created to be a super fast coin and can be staked but in fact now Dash is very unfriendly because it is less popular than Ethereum. There is only one chance for Dash right now if it wants to increase its price, namely innovation that attracts the community so that Dash coins are widely purchased and the price goes up again.