I wrote cursive for many years. In the end, I found it to be slower to write, slower to read, and uses more ink or graphite. Also there's a possibility to smear words when moving the hand back to finish the t's and i's, and the extra movement there also seems inefficient. In addition, with block letters I can fit more on a line legibly, using less paper in the end. I'm not really sure what the advantages are.

I do think it can be useful to know. There might be less cursive out there now then there was, but I do come across cursive documents from time to time and I'm happy that I can read them.