On AppViews, Clients, and the Missing Tooling

The AT Protocol community draws a careful distinction between "appviews" and "clients." An appview is the collection of records assembled by backfilling from Personal Data Servers (PDSs) and consuming from the firehose—the aggregated, indexed view of the network. A client pulls from the appview and presents it to users. But I keep asking: why this distinction? Why not just call both the client?…