I recently had my lovely privacy hedge in my back garden pruned. It’s mostly made up of Rhamnus alaternus and needs to be pruned about 2-3 times a year. I planted the shrubs about 7 years ago and if I had just let them grow unfettered, they’d all be as big as the very bushy plant on the left in this picture:
The hedge goes around 2 of the 3 sides of the fence in the garden (the south-facing fence is covered in roses!) and it makes my small, downtown rose garden an oasis of calm for me and a secluded haven for the local birds. The only problem is keeping it just the right height- tall enough to block out the neighboring buildings and short enough to let enough sun in for the roses!