SQLite concurrency and why you should care about it

When hctree [1] becomes stable in SQLite, it will be the only database I will be using lol!

I presume the `hc` part in project's code name should be High Concurrency.

[1] https://sqlite.org/hctree/doc/hctree/doc/hctree/index.html

Thing is if you design your app to have a single writer you can probably get higher throughput than multiple writers in concurrency mode.