Why does Dev Mode insist on showing floating point numbers with a fairly ridiculous amount of significant digits, and write numbers to the .cfg files in that way? Surely the relevant precision would be two or perhaps three digits in most cases. It just a waste of precious screen space and makes reading the information harder.
One difference is physical locations, coordinates. The modeller might well know the exact locations of points on the aircraft down to tenth of an inch precision, from official manufacturer information.
But for other numbers displayed in the UI and stored in the .cfg files, three significant digits would be enough. Having numbers like 13.958436 or 41.799999 in an engines.cfg, for instance, is just silly. They could well be rounded to three significant digits. Much easier to read. And while at it, the cfg file writer could add some whitespace, like after commas in table lines and around = signs.