In my case I have a big stable with several rooms, stalls, imported horses from Poser, many objects and many lights. It is a game project so I do not need to have everything present in every rendered image.
With Vue 5 I had to assemble for example the rooms by them selfs with objects, lights and cameras if I wanted to minimize the risk of crashes. The memory issue only happened a few times for me, my biggest problem was crashes when the scene got too big. And then I had not even added the landscape around the houses.
I think it handles the huge landscapes better than cluttered indoors. And it is a landscape application. IMHO
I am actually redoing the whole thing now in vue 6 because of the better options. .... sigh.... the never ending project...