Hoping someone can advise please. We are on a sloping block and our backyard has great views of the hills but also has a not so nice view of the neighbourhood house roofs. We have decided to plant lily pilly ‘straight and narrow’ , 1 m apart, to block some of those views due to the height that can be expected from this variety. However, a late realisation that’s been bothering me is that I hear Lily pillys only live 20 years or so. Just not sure if this is the right plant for us anymore (as I don’t know if I want to be replanting a hedge in my retirement:D) or if there are other options to screen 6+ metres height in my backyard. Any thoughts / advice is greatly appreciated.