Recently, I often encounter situations like "the page freezes for a moment, and the balance updates a few seconds late." I get the urge to visualize this on-chain data flow as a small geometry: wallet/frontend → RPC → indexer → subgraph, then to your screen. Basically, the blockchain itself might be fine; the lag is often caused by a bottleneck somewhere in the middle: RPC can't handle requests and queues up, the indexer syncs slowly, the subgraph is still rebuilding its index, and what you see is like being offline but not actually disconnected. These days, major chains are undergoing upgrades and maintenance, and everyone in the group is speculating whether they'll migrate. I instead look at these dependency points for single points of failure: switching nodes, restarting the indexer—ecosystem projects might not migrate but still cause user experience issues that drive users away... Now, before I open a dApp, I first ask myself: where does it get its data from? If it relies on just one service provider, then a lag is basically inevitable sooner or later.