Also think about it this way:
Redis will eventually become obsolete. It may take 10 or 50 years, but it will happen.
But kilo taught many developers about C, editors, terminals, and how simple it is to do syntax highlighting. This epiphany inspired me and many others, and the things we make because of that will last much longer than Redis.
Redis does a lot of things most people don't know about and its all super optimised.. I am not so sure. I would not want that happen simple as I would be really bored using one way to do everything ( prb sql )
Most people use it as a cache,.. you can build a lot of things with it that are far outside this narrow view... ( say a bidding system or something like that )
And for the other comment Scaling is possible via the commercial offering.. sofaik..
I didn't get to persuade anyone to let me use it for that.. I really wanted to.
Super optimized? Veto. It could use much better modern thread-safe hashmaps. With at least twice the performance.
But it has a fantastic ease of use