There are already numerous iOS apps and numerous websites. And yet, people keep making more! I think I broadly agree with your overall point. I’ve just spent a

There are already numerous iOS apps and numerous websites. And yet, people keep making more! I think I broadly agree with your overall point. I’ve just spent a lot of my career working on niche problems like this. And there are a lot of people working on systems software. Windows, Linux, macOS, chrome, postgres, etc don’t write themselves. But unless you move in those circles, you can spend your whole life never interacting with any of those engineers. > we just call them databases and filesystems instead of b-trees. The b-trees I’m talking about are in memory. Btrees often outperform other kinds of in memory tree structures (avl, rb, binary, etc) because you get fewer dram memory stalls.