Why are Litecoin's transaction fees multiple orders of magnitude smaller than Bitcoin's? Is this a result of genuinely better technical decisions than in Litecoin (mining is cheaper because it's less hardware-friendly, blocks are generated more quickly) or just lower transaction volume / demand for transactions because it's less well-known? That is, if Bitcoin somehow implodes tomorrow and everyone moves to Litecoin, would you still expect similarly low Litecoin fees?

Was this an on-chain transaction or a Lightning transaction?