Why do you keep making the same argument again? Yes, SQLite has the parts needed to build a (very poor) graph db. But it will never be as performant as something dedicated, because the data structures used in SQLite have terrible characteristics for the algorithms used in graph operations. I like SQLite a lot, but it targets a niche and graph operations is simply not that niche.
Using Sqlite for semantic web is the topic of the post. And while Sqlite is not suited for billions of triples, it can be adequate for the small graphs. The advantage is that Sqlite is widely deployed.
