This is super interesting. I'd imagine there's a pretty good reason that you picked this over something like an array of arrays of values or something like { "row1": [...], "row2": [...] }, but the only reason I can think of is if there was some of external constraint that made CSV necessary. Was it that simple, or was there something else?
Embedded system with limited bandwidth, the data was mostly simple values that did not really need escaping 99% of the time (mostly no unicode or control characters in strings, but still _possible_, and we needed the streamability of array-of-structs instead of struct-of-arrays.
Why not some binary format, then? Well, it's easier to debug and share the data with non-technical people (just open in excel or equivalent) without having to run a conversion step.
