One underrated advantage of photoperiod seeds is that you control plant size by choosing when to flip to flower. A short veg produces a small plant, while a longer veg fills a large tent from a single seed. The veg planning notes on https://potentthcseeds.com discuss how different strains respond to veg length and the typical stretch after the flip. That control simply does not exist with autos, which is why many growers still prefer photos.