hi @Susu, some jujus have droopy branches when laden with fruits, like li, hj, autumn beauty, from what could recall. Trees that don’t get plenty sun also tend to get droopy, since the internodes are longer. Other jujus have stiffer wood, such as sihong, sugarcane, coco, lang and some spinosa-type rootstock. While the rest are in between, but for the most part, juju wood, especially if already developed heartwood, is pretty strong and hard.
trees are quite ornamental due to the sparkling foliage in summer, and zigzag branching in winter. As @mamuang mentioned, they are actually our favorite front yard tree since they live long and are practically impervious to diseases/pests which often result in sudden death of apples and peaches. A dead apple or peach tree on your front yard isn’t just an eyesore, but having to chop and remove them quite often is a chore that makes you sore!
they can also take pruning well, since capable of fruiting on both old wood and same-year green wood. You could sculpt your trees to your heart’s content. You could also braid them to minimize sagging. This results in auto-grafting, and quite ornamental and eye-catching. Braided uprights are more resistant to lateral movement/sagging, as opposed to having them grow separately. We posted a few pics of mature trees and a braided contorted in our jujube video