The big advantage of writing in cursive is speed and less muscle fatigue. Writing in cursive requires far less lifts of the pen and far less tiny movements... a reasonable cursive script (Spencerian, but with a little less flourish) is quite easy to write legibly and with speed, with just a little practice.

The junk that used to be taught in US schools (a type of Palmer cursive) it not fun to read or write.

BUT, the above analysis only really applies to people who want to write, and want to write a lot.

(Apologies for repeating my reply from above here as well.)