I think majority of places are beyond that point. I’ve found that planting whatever works, even if incrementally, should work. I plant natives, but for natives alone won’t work unless my entire neighborhood does so. So you supplement with non natives that provide something. Milkweed will help with the butterfly larvae but what do you feed the butterflies? Something that’s long blooming and nectar rich. So I let the red valerian that grows like an invasive weed in all conditions, remain blooming in my yard for months at a stretch.