What replaced neon?

I'm curious to know, what precisely has taken the place of neon in recent times? Is there a specific technology or material that has emerged as a viable alternative, offering advantages over neon in terms of efficiency, cost, or environmental impact? Have there been advancements in lighting technology that have led to a widespread shift away from neon, and if so, what are the key factors driving this change? I'm eager to learn about the evolution of lighting solutions and how they've evolved to meet the demands of modern society.