I’ve noticed something worth avoiding in writing anything approaching good speculative fiction: never explain too much, be economic with any explanation you do, and only explain, by showing, not telling, what actually needs explaining.
I notice a failure to do that in some of my earlier fiction of even a few months ago, much less from years back, not consistently, but often enough to cause concern. Mostly it happens with a piece that I spend only a couple of hours on, in total writing, editing, and proofreading time; almost always a hastily written piece or two when a deadline looms. That’s bad form when it occurs.
But what sort of things ought not to be explained?
For example, there are the Heisenberg compensators of Star Trek used by transporter technology, that offer a nod to the quantum mechanical problems of teleportation without being explained as to how they work, which is good use of rubber science technobabble that adds to, not subtracts from, the feel of the story.
It’s good to acknowledge real science even when not strictly conforming to it. It’s one of the hallmarks of any good SF franchise.
Another would be the Holzmann effect of Frank Herbert’s Dune series, using variations of that phenomenon’s name in different books of the series. It’s cleverly never explained in any detail, but serves the background and feel of realism of the setting very well. Again, a nod to science without spoiling the fun with an explanation which would likely backfire as seeming contrived and even less consistent with real-world science. As a plot device permitting rapid space travel and personal force-screens, enabling the plot by fostering willing suspension of disbelief, it works well for that reason.
From my own writing, like my Gods of Terra setting, both old timeline and the current reboot, there’s the Kurtz-Dunar effect, named for scientists Raoul Kurtz of Terra and Ranan Dunar of Sirug, permitting cheap, safe, and efficient surface-to-orbit and interstellar travel, and personal teleportation via short-range warps in space-time, among other things.
It’s annoying when I see something over-explained elsewhere and annoying when I do it myself as well, especially the latter.
After all, if I really knew how the Kurtz-Dunar effect, or ancient relic technology like hypershards, actually worked, I wouldn’t be using them as plot devices in my fiction, but instead building and testing working prototypes under contract from DARPA! and I am quite obviously not doing that . . .
So, the more shone, not told, and the more economic that is, only what furthers the story, the better.
That’ll do for me, one story at a time, no matter what region of space-time, and which space-time continuum, is involved.