Mempool data shows that SpiderPool mined an empty block (i.e., only coinbase transactions) at Bitcoin network block height 840421.
Some analysts pointed out that although "empty blocks" do not process any pending transactions in the memory pool, they do not add more chaos to the blockchain network, but instead enhance the security of all previous blocks and reaffirm the miners' commitment to maintaining the integrity of the network. "Empty blocks" are actually a testament to Bitcoin's clever incentive structure. In this system, every decision, even if there are no transactions in the block, contributes to the overall strength and resilience of the network. Empty blocks are not common, and are usually not attacks or spam, they are strategic decisions made by miners.