In early 2016, the masternodes that comprise Dash’s governance system voted overwhelmingly to upgrade to 2MB blocks, with 99 percent of the network in favor. Many in the cryptocurrency world saw this as a simple attention-getting gimmick, as Dash’s development priorities became focused elsewhere. However, with the recent release of Dash version 12.2, it looks like larger blocks will be implemented soon.

Source: https://cointelegraph.com/news/as-bitcoin-rejects-2mb-blocks-dash-prepares-to-implement-them