I prefer how information dense and responsive steam is.
Epic is laggy, logs me out constantly, and is inefficiently organized (at least by default). I don’t want to scroll through cards or change my sorting filters/layout each time I want to find something. When I open steam, it has a permanent tab that says LIBRARY at the top, and when I click on that, it gives me a massive scrollable list of my games, defaulting to A-Z. Simple is better.
Plus, user reviews are really nice to have when considering dropping $ on something.