Sulfur caves were adjusted throughout the snapshot/prerelease cycle, but for dappled forests they seem to have gone the complete opposite direction. I was really excited initially and for the most part I still am, but the way the biome currently generates leaves a lot to be desired.
The geyser set up on the right, which doesn't need surrounding blocks to hold the water, no longer works. I think it's because they fixed the bug linked below, where the geyser force could go through some transparent blocks. Besides this, it's amazing that we can now control geysers with dispensers and lava, but I hope they make it so the right set up is possible again.
Without adding a specific redstone powering feature, players could control geyser eruptions with just a piston and magma block if the eruption happens before the randomized cooldown. Alternatively, the cooldown before the first eruption could be skipped, then following cooldowns occur as normal.
It’s a legitimate use of sulfur, it fits the chaos theming, it gives a way to obtain gunpowder in peaceful, and it would have paired well with them adding TNT sulfur cubes, it just seemed so obvious.
original image is from MintRefresh on twitter