There are many opinions about getting the actual UTXO set of blockchain.
Do you think that this important database must be based on data which saved on disk and never modified after, only appended?
I mean that only in this case of history based calculations, provide high level of node security.
Is it true that UTXO set which has the full node for to verifying transactions calculates only from recorded on disk information? Or it is a compressed data received from the network?