Earlier quoted context omitted.
> True, Monero doesn't have smart contract support... This is way more central to why people aren't building on it than you seem to give credit to: people simply can't build on it... I mean, even Bitcoin is programmable (which is how people have been able to build stuff like Lightning and bridges to contract side chains like rsk). Not being programmable--which sadly is kind of a trade-off for their core premise of be…
I probably am massively understating it yes, but I see no reason why an ecosystem around Monero can't flourish that enables sort-of smart contract capabilities. But like you said, it would take a huge amount of effort to enable smart contracts on Monero while not compromising privacy guarantees. It does seem to be a tradeoff. Solana has smart contract support with low fees, but its network is very centralized compare…
I don't see how you can implement smart-contracts in general on Monero because it's not programmable. You can write small arbitrary messages via tx_extra and in theory some other chain that looks at the Monero chain could read that, but because tx_extra messages are direct-writes and aren't automatically encrypted using the wallet keys or anything, there is nothing special about them besides them being immutable. In fact in some ways tx_extras could contribute to deanonymizing the chain if it created correlations between ring signatures, and Monero devs have discussed removing it several times.
There's a question of whether Monero itself could be extended to be programmable and actually do things with those messages, but I'm guessing the answer is probably no because it would bloat the chain and have questionable value (right now Monero is "unixy" in that it does one thing and does it well), even if it were possible to do.