This still produces a solid desktop background of course.

There are so many little quirks to windows and I've been using it so long I know there used to be a good reason to do this - vaguely I remember it being related to minimising RAM in something like windows 2000 or XP. Probably from the days when I was trying to squeeze every ounce of performance out of hand me down parts to play some old game.

The decision to set the .DEFAULT profile wallpaper (the desktop that appears behind the logon UI) to a photo for Server (2016) still irks me. Sure-- set that on the desktop OS, but servers don't need pretty pictures by default. (This decision is emblematic of the "children are running the pre-school" mentality that seems to be pervasive at MSFT now.)

In 2011 I was contacted and engaged as an expert consultant by a mobile radio deployment company which was working on a federal government funded program to update the mobile law enforcement vehicles technology operations within the State of Pennsylvania. There was a technology problem no one else could solve even after having many Phds and telecom engineers toiling over algorithms and speculative performance numbers of a large wireless operator in the USA. I of course had to sign NDAs because the information I was exposed to proved that wireless coverage was in fact NOT everywhere and this engineering information directly conflicted with the hundreds of millions spent on marketing stating otherwise. "Can you hear me now?" [NOT a disclosure of the parties involved but fitting here nonetheless.] After many meetings with all the book educated experts flaunting their credentials the day finally came after I asked several times over to just show me the problem. We drove many hours to a facility in Pennsylvania to meet all the "experts" and to witness in person a law enforcement vehicle that was experiencing this detrimental network delay that was making the system unusable and putting law enforcement officers' lives at great risk from this delay. We sat in a meeting all morning with 20 experts around a table talking about what the problem could be and finally I raised my hand and said to all the experts, "Please just show me the problem." A law enforcement vehicle was brought in at my request and I walked out to meet the officer and listen to his concerns. Within one minute of meeting him he logged into his remote profile and I immediately knew what the issue was, his desktop image. Within two minutes of meeting him I had instructed the domain admin on the restricted law enforcement mobile network to set all remote desktops to pure black, NO images. Three minutes after meeting him he logged out and logged back in to his mobile law enforcement computer and he then paused, looked at me in amazement and called me a genius. He told me they had been working on this issue for months and had called expert after expert and no one could fix it and here I did it in less than two minutes. Four minutes later I walked back into the room of "experts" and informed everyone the problem had been fixed and literally no one said a word and just stared at me in awe until we left a short time later.

I do have a picture for my login screen though.

Honestly for me it's half that and half liking to have a plain, not distracting, background. I'm not to the point that I'll turn off desktop icons, but I like a plain black background.

But I always used black as the background for energy saving. I believe at least there black is more efficient.