Why Choose Decima?

So, lemme preface this a bit by saying I've been a hobbyist developer in a past life. First part of my formal education was in computer science, I've trained in and used a few different languages. In my life, I've used UE (3 & 4), Unity, Cryengine, Torque, even RPGMaker back when I was still in high school.

This is all to say, while I'm certainly no expert on the topic (especially with advancements made in the last 5-10 years), I'm also far from a complete fucktard on the subject. So please feel free to get into some level of specificity and technical detail if you're qualified to do so...

Why is Decima a preferable engine? I know that, to some extent, this is probably just preference or familiarity, but is there some feature/function/selling-point that actually makes Decima preferable to the litany of other options on the table? This also isn't a criticism of the choice, this is just genuine curiosity.