Rebel Galaxy Outlaw, offers better customization and storytelling. No Mans Sky offers better economy and synthesis game play, in addition to base building and planetary exploration. X4 has the best economic simulation of all full release games, and offers multiple layers of customization and control. Combat in X4 is a bit janky, though that game in its later stages is mostly played from menu screens like EVE online. EVE itself as a fully player driven experience is still improving its underlying code base regularly.
The reason I still perfer elite, given the choice, is that it feels more grounded than any of the others. Its a harder game to learn, and play. It demands your best and punishes you harshly for mistakes. The games atmosphere keeps me occasionally comeing back for a check in. Its buggy technology, and the lack of forward progress on that technology, is what keeps driving me away. No other sim offers this level of grounded consequence game play, except star citizen. Right now, Elite Dangerous is more playable than star citizen. Once that paradigm shifts, and star citizen becomes stable enough for mid range systems to readily handle, it will become the superior experience. It will become what I play unless Elite can offer something more than it is now.