AFAIK OP_RETURN don't burn bitcoin and create non-spendable UTXO. It's only true when people attempted to store information on Bitcoin's blockchain before OP_RETURN is introduced,
Yes, that's precisely the statement. But OP_Return are long used by people to make the coins unspendable by removing the UTXO set which will thus reduce the number of spendable coins in existance. Probably I should have been more clear in my above post.
what you are referring to is sometimes referred to as proof of burn and it is the least common way of using OP_Return output script types. the fact is the primary usage of this type of PublicScript is still to insert arbitrary data in the immutable bitcoin blockchain mostly used by altcoin miners who are doing some sort of merge mining (the data being their block hash) or altcoins such as those of Omni layer sending transactions that way.
