I was reading about computation the other day and stumbled upon a concept where something can't be computable if it requires more operations than there is energ

I was reading about computation the other day and stumbled upon a concept where something can't be computable if it requires more operations than there is energy in the universe to do the operations. While reading the post you linked to, it struck me that the speed of light is a similar barrier to us. We can't travel the speed of light. We always like to talk about it and what we would 'observe', but it's theoretically impossible for us to do.