A lot of people taking about relay feeds but what would really be next level is a global feed that mixes in equal posts from each of your relays, but counts the time you spend on each post, and if you interact with it, and uses that to adjust the prevalence of each relay in that feed. So slowly your feed turns into only the better curated relays, but you don't have to choose a relay each time you wanna doomscroll. Of course this would all be client side.