Okay, fair enough. I thought my previous test was parallel as well, but I was mistaken.

Here's one for 64 parallel writes: https://gist.github.com/markuswustenberg/f35ab7e191137dca5f7...

  $ make benchmark
  go test -bench=.
  goos: darwin
  goarch: arm64
  pkg: sqlite
  BenchmarkWriteBlogPost/write_blog_post_without_WAL-8               100   16317415 ns/op
  BenchmarkWriteBlogPost/write_blog_post_with_WAL-8                 1196    1198679 ns/op
  BenchmarkWriteBlogPost/write_blog_post_with_WAL_and_Go_mutex-8             58455      17461 ns/op
  PASS
  ok   sqlite 4.557s

1e9/1198679 = 834 writes per second is still far from crash and burn territory when using just WAL mode.

Of course, it gets more interesting when there are also concurrent readers, as people are trying out elsewhere in the discussion. But the point still stands: it can handle way, waaaay better than "fives of authors" in a not-at-all scary way.