I mean, there is only other platform that functions like steam (Epic store) because GoG focuses on DRM-free games, which is better than Steam pushing for DRMs.
That being said, Epic lowered the fees and showed steam what's a reasonable tax (I'm sure you've heard about Epic v Apple). Sure, they're not as feature rich as they're quite new, but you cannot deny the fact that both GoG and Epic does some things that are great for us, customers.