They still use ropes, and I think the exact same amount they always have. But they can only really use them wherever they have the little holes in the ground to hold the poles. Frontierland and Liberty Square have pretty much exclusively ropes to my knowledge for the parade.
Edit:
You can see those ropes in
these photos, and you can see some of the ropes on main street/the hub in
these photos. Pretty sure they use the ropes for the fireworks on mainstreet. In fact, I think there’s maybe more ropes now since they have ropes on movable poles near the Main Street Bypass.