Hmmm, I don’t think that's accurate. To label plant ecosystems as 'winner-takes-all' really misses the forest for the trees (sorry..!). It's not all about sun-hogging; different species have unique needs and abilities, thrive in symbiotic relationships, and flourish under different conditions. For instance, take the relationship between certain fungi and tree roots, where the fungi provide the trees with hard-to-reach nutrients and, in turn, the trees supply sugars to the fungi. It's not a simple competition, it's a world full of complex interactions, adaptations and interdependencies. That's generally why we refer to these as 'ecosystems', no?