The upgrade reduces smart contract execution costs while laying the groundwork for Ouroboros Leios, a major scalability upgrade expected later this year.
Source: [CoinTelegraph](https://cointelegraph.com/news/cardano-activates-van-rossem-hard-fork-paving-way-for-leios?utm_source=rss_feed&utm_medium=rss&utm_campaign=rss_partner_inbound)