Cascades are VERY hard to do, both visually and horticulturally. Visually, it's more than just bending a long branch below the horizontal. Effective cascades generally have a "crown" branch that sits at the apex of the tree vertically somewhere near or over the trunk base. That provides visual "tension" between the trunk and the dropping branch
Horticulturally, the descending branch grows counter to where the main tree wants to grow (which is UP, not down) That means, circulation of nutrients and hormones isn't as effective in the descending branch--which means the branch is always in danger of fading away.
Also, storing a cascade for the winter can be problematic in temperate climates, as root protection requires burying or otherwise protecting them. Since the branch on cascades is BELOW or even with the bottom of the pot, that protection can kill the branch. The two issues of weakening and shelter can be helped a bit by storing the cascade on the side of its pot with the long descending branch pointing upwards. That means, however, the pot will be difficult to water.
Speaking of watering, cascade pots are VERY hard to water, since they're typically deeper and narrower than "regular" bonsai pots. That makes them drain VERY VERY quickly at the top, leaving a typically soggy bottom layer that may not dry out effectively. You have to learn how to properly water cascade pots.