Thing about rock bottom is you think you’ve hit it but then you find that you have a magical pickaxe that can dig past rock bottom
you have a magical pickaxe that can dig past rock bottom
That's only true in creative mode. You need to use the TNT+Piston glitch to destroy bedrock in survival.
In the overworld not really. I don't think you can even place blocks below the lowest y level.
In the nether you can use an Ender Pearl to get on top of the bedrock "roof" in the nether and then create a hole to easily get above or below. It's completely flat up there and mobs don't spawn on bedrock, so it's a great place to build farms or just travel easily.
