Native format is faster (especially for colocated joins), but it's way more expensive if you have to run a bunch of separate storage nodes vs just using S3, especially your query volume isn't that high.

I liken it to the BigQuery cost model, where storage is effectively free.

With that, I was able to get the interview although I ended up failing it. My lack of experience in C++ was probably one of the main reasons. Your course helped me stand my own during the interview and even though I had zero database experience apart from finishing the course, I felt adequately prepared.

Thank you for making the course open source. As a working professional, it was helpful to be able to do the course on my own time. Suffice to say, I am a big fan of your work and thank you for introducing me (and other fellow learners) to the interesting world of Databases!