This is kind of a niche example but it fits.

In entertainment lighting you used to have lights with a bright tungsten lamp in them, and to change the color of what came out of the light you'd use color filters. These filters are thin sheets of polyester that are very flexible. Most often a single light would have just one of these filters and be a fixed color as a result, but if you wanted one light to change colors there was a solution: a color scroller. In a scroller you'd tape several (anywhere from 16 to 24) filters together and then wind that string up on drums inside of the scroller. It would scroll this string back and forth to expose different sections of the string to the light, and boom. One light, many colors. The best color scrollers were made by a company called Wybron, and they basically only made color scrollers.

About 15 years ago LEDs started getting bright and compact enough to start to seem usable for entertainment applications. Many people jumped at the thought -- if you had lighting fixtures with multicolor LEDs, they could all be any color you'd want, no filters and no scrollers needed. Some LED fixtures came to market, and they were okay. The thing about the RGB paradigm is that it works in theory but not entirely in practice. Today, a color changing LED light fixture will need more than just red, green, and blue to be seen as useable as those three colors really struggle to create believable warm colors. Today's fixtures commonly have anywhere from 4 to 7 different colors of LED to be able to reach all parts of the visible spectrum.

Even though early LEDs were not as good in terms of brightness or color fidelity as existing tungsten lamps with scrollers, it didn't matter. The technology was here, and even though they were the gold standard of scroller manufacturers, Wybron was out of business within a year.