Higher mountains

So I know that this idea has been covered a few times but I have an idea so that the higher build limit wont make the game way laggier: in mountain biomes (Grove, snowy slopes, stony peaks, etc) The build limit gets raised, hopefully to around 500 blocks but the higher the better, then in all other biomes the build limit stays the same to decrease lag. Some other biomes to add: Frosted summit, this mountain looks a lot like the snowy peaks biome but has spruce trees growing in it. Scree biome, if you don’t know what scree is, it is lots of sliding loose rock fallen from higher up on the mountain, Minecraft could have this by just adding large gravel piles under cliffs.