I suppose it depends who owns the property you rent as to how secure you are (or maybe feel you are) growstuff.
If you have a council or Housing Association tenancy you would not be likely to lose it. If you rent from a big estate they also like continuity and want to keep the property as an asset for future generations. They are generally prepared to consider adaptations if ultimately it will not detract from the asset.
My parents sold their home when they retired and moved into a rented cottage where they added on a conservatory. The estate was a large one and gave me ½ the "added value" of the conservatory when they died.
It does work for some people.
We, for example, would never have been able to bring our (5 children) family up in such a beautiful home in an otherwise "expensive" village if we hadn't rented. The rent was definitely worth it for us.
Scottish political mess. Is Devolution working?