What do you know about the advantages and disadvantages of garden tools in the development of mechanization?

Urban development can not be separated from landscaping, so can not be separated from garden machinery. So why mechanization?
1. Security
With the continuous improvement of the greening level, the pruning requirements are higher and higher. Trees need to be pruned 3-4 times a year when they are young and mature. In the aging stage, trees need to be renewed and pruned once every 2-3 years in the dormancy period. The pruning pressure is very high. In addition, it's hard and dangerous to work high above the trees, so it's hard to recruit tree workers. Therefore, it is necessary to provide a convenient aerial work platform to ensure the safety of the treemakers, which are all issues that must be considered.