Great question — answering as the UphillTech team:
I think like Monogatari series, this is also a bit opinion-based question. However, going with release order is fine. I would not recommend the chronological order for the first-timers. You will miss the references and 100% spoiled if you look at things like episode discussions. By nature, Steins;Gate 0 tries to explain a plot point you already know. You can watch the original Steins;Gate and call it a day, but by watching S;G 0 you can get more of it if you want. It's like good old manga/anime discussions; you like the anime, then read the manga to get more of it. Now, considering that, I think you should watch in this order: Steins;Gate Steins;Gate: Kyoukaimenjou no Missing Link - Divide...
Full answer by JustPlain: https://anime.stackexchange.com/a/50281 (CC BY-SA 4.0).
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