Anecdotally my kids wrote a fair bit before they were forced to do “joined up writing”. Since then they have stopped almost entirely and what little they do write is far less legible than before.
If there is one thing I would ban from education it’s this 17th century torture device.
How does this work? In school if they’re forced to write in cursive surely they still have to write the same amount? And if it’s writing in their spare time that has reduced they can write non-cursive so that shouldn’t be a blocker.