The 30 plants per week stuff looks like it's mostly based off one citizen science study that acknowledges that it focused on healthy adults, had underrepresente

The 30 plants per week stuff looks like it's mostly based off one citizen science study that acknowledges that it focused on healthy adults, had underrepresented groups, and it didn't directly tie the diet to health outcomes or longevity. It looks like it was focused on the diversity of the microbiome. Other studies have looked at various microbiome related factors, but it doesn't look like any directly study the 30 plants per week part. Various sources even acknowledge that salty, sugary, and fatty processed foods can also be responsible for decreased microbiome diversity and increased levels of bacteria associated with negative health outcomes. Most also stress the whole foods point. It doesn't appear that any control for the source of the plant point related to processed foods - eg was there a cohort that ate non-fermented pickles, sun chips, potato chips, fruit wines, etc to compare with whole food plant based diets. So based on the studies around your 30 plants topics, even they make the point about choosing whole food or minimally processed sources.