Examples of good technical UI designs

No pictograms! English text words for every item.

I know developers love it because it's less localization. Have you ever tried trouble shooting over the phone with pictograms?

"Now click on the..triangle with an arrow coming out of it...no you clicked on the circle with a triangle inside it...OK then, click on the hamburger menu...it's the one with three horizontal lines...you can't see one? Is it three dots maybe?"

There are simulation games that have extremely complicated and extensive UIs for taking various actions and analyzing in-game data. One good thing that some of them do is give tooltips and explanations when you hover over the button/graph/table/section/panel you're working with. Done smartly, I think this can be a great approach for managing very complicated systems.