I think there is probably truth to both sides, but we can hardly test as the current clients are far from fast and flawless clients. So far I've used primal, coracle, and freemfrom. All of them are quite slow and occasionally buggy. A friend of mine who was on Nostr and enjoying it gave up after posts repeatedly failed. To be clear, I dont have instagram, get on FB about 4 times a month, and use x about twice a week. YouTube is the only social media I use consistently. I have been trying to use Nostr daily because I love the ideas, but I can completely understand folks who dont use it currently do primarily to UI. After all the chance of getting zapped is far more exciting than algorithms.