For me it’s control. While I like the ability of soil to buffer some mistakes. It opens the door for other problems that outweigh having to pH water and water more frequently. Soil attracts much more pests and watering is dependent on plant intake. With coco and jacks you water with feed everyday regardless basically. It’s much more straight forward.
Today’s jacks mix. No pH up added. Just tap water used to balance like I learned from @Hellraiser
Mine was about ,1/7th to get there.