On the BBC there was an episode where CRON was discussed. It showed a man who peeled an apple threw away the apple and ate the peelings. It seems bizarre but I think this will be a trend in a few years. It ticks boxes of less food waste, less bulk, high nutrition, ultra low calories. Whether it works or not who knows since many diets tend to be for status not health; veganism with its absence of B12, Atkins with its high fat, Paleo based on inaccurate pre-history.
But that's the issue vegans can't live without artificially supplementing with B12. To me that shows the vegan diet is not valid or survivable. If you were on a desert island or stuck in a remote location and were vegan you'd be dead after a few years from B12 deficiency.
