Good UX is unbelievably, grindingly hard. If you want to make a product with a good user interface and overall experience, 90% of the work is going to take you about 25% of the time and the remaining 10% is going to take you 75% of the time. Most hackers decide a product is done when it works, but in reality they're not even half way there.
Apple is probably the overall king of UX. If you look at their process and their culture, they obsess and obsess over tiny little details that are irrelevant to core functionality as understood from a purely technical point of view.
Closed silos have a clear revenue model. That enables them to invest in pushing product quality and user experience the rest of the way, past where hackers and enthusiasts would take it and into the realm of polished usability that real customer bases demand.
Who's going to pay entire teams of designers to obsess over the filecoin.io client's "experience"?