> but why a picture of a table instead of a table?

I guess they drawn the whole thing in an image editing tool and exported it as one image. A Table would've required much more effort, multiples images, styling, placement and many web requests to load them.

Because Substack. Same thing with Medium articles. Never used either of these platforms, but surely they allow custom HTML?

Another question, does anyone know any good curated resource that mention system design use cases of each data structure and algorithm?

I assume its part of the system design course on https://bytebytego.com/.

Yeah I can look these up no problem but links to articles would have been rad.