Then you would delete it > everything would be append-only by default doesn't mean everything is permanently etched into stone or written on the blockchain, i

Then you would delete it > everything would be append-only by default doesn't mean everything is permanently etched into stone or written on the blockchain, it just means that "by default" everything you write is written to a new block[1], instead of having to free up old blocks to reuse and keep track of which blocks of storage are available [1]"block" is just meant as a generic unit of storage, I'm not trying to say anything about actual drive blocks and implementation details