Quite a lot of people nowadays - at least not at a fluent level. I know I’ve gotten worse at it over time due to rarely requiring to read much of other people’s handwriting or handwrite myself, to the point where even in the reasonably clear example in the article I had to stop and consider a few words. Without experience reading cursive it’s noticeably harder to comprehend compared to printed text, and we’ve now had a whole generation grow up in a world where pretty much everything they read was printed (and usually on a screen at that) rather than handwritten.