Unquestionably. Web apps and the like which are little more than networking frontends to a database are probably the most common type of software written these days.
Ah, we’re talking about different things. I took “network layer” to mean something like the ability to connect directly to the database over the network, not through some shim application.
Meaning something like rqlite[1]? The age of fat desktop clients all connecting back to the central SQL server is long behind us, so yeah there is probably little reason beyond fun for something like that these days, but where there is fun!