I love Coco and never going back to soil, hate that hydrophobic shit.
I like organic nutes and ofc the microbes work for me, but gone to pure Coco coir and synthetic, don't regret that move until today.
Maybe I give those jiffys another try, just pure Coco coir, buffed and washed with low ec are good to start with but there is a lot room for improvement, like the water capability.
If I don't check my seedlings daily which could be fatal, they could dry back really quick or stay soggy for too long. Jiffy could make a difference also in root development.
My local grow store also told me about the eazy plugs which shall do wonders but for sure they're a lot pricier and better for him to sell us some