I like it. Gives another plentiful colour for my colour-coded levers, constructions, and gearing. Which is important when you have like 15 levers and hundreds of gears and axles controlling what you're doing with magma and water, and pulling them in the wrong order could flood everything or kill hundreds.
And you have a terrible memory of what does what.
You can use [N]otes for that, but i agree with you, its just a matter of taste, some people like it, some don't. No real reason to kill it then, and if microline messes your legendary dining room's colours, so will all other rocks and ores.
I keep being told that, but it never quite triggers until the point where I have, say, 5 rhyolite levers in a room, all with one mechanism, all hooked up to the same device.
Next time it happens, I'm cutting my losses, backing up the save, and ripping out the whole assembly.