I always disliked RGB LED lighting. It was just the idea of it being unnecessary and a waste of money. Over time, everyone seems to be offering it.
Now that it's more mainstream and included on everything from motherboards to keyboards to case fans, I'm liking the effect on my builds. The costs are now minimal.
No, it doesn't improve performance, but it's easy on the eye and RGB lighting doesn't produce enough heat to matter to your case's temps.
My wife and daughter keep complimenting the systems with RGB lights in them. So when I built my wife a Ryzen-5 1600X box for her office, I included some RGB bling to go with her ASUS ROG Strix Gaming RGB mainboard and the AMD Wraith Prism cooler I used. All of the case fans are RGB and I have them changing their intensity slowly from red to green. (colors that she liked the most)
Ryzen likes fast RAM and I was able to get my 16GB of Geil DDR4-3200MHz. RAM to run at the proper speed. It's RGB enabled too, so add it to the overall effect for her.
She's really happy with it and when Momma's happy, the whole house is happy.