In the last Minecraft Beta and Preview 26.30.29, the natural generation of Glow Lichen has been significantly removed in the Sulfur Caves compared to before, making the Glow Lichen generate only as frequently as in other cave biomes. I feel like this is a downgrade, because the large amount of Glow Lichen in the previous versions gave a unique feel to the Sulfur Cave Biome, and I think I am not the only one to think so. It makes it easier for the player who explores it to appreciate the form and color of this cave, the feeling of being in an immense natural structure, and also making the sulfur pools and sulfur cubes more visible. Even the background of the main menu still shows a Sulfur Cave with a lot of Glow Lichen, and I think it looks way better.