air pruning

Not sure if this belongs here or the Tea House. I've recently been playing with 3D printing some air pruning pots since I can't get my hands on any pond baskets. Gone through 2 iterations of prototypes. One pot takes 2h to print and is 65/65/65mm in size but I'm planning on printing bigger...

Well, I have fallen for the siren's chant and purchased 2 air prune pots, one XXL and one XL, from AliXPress. During the winter of 2021, one and a half years ago, I've reppoted a big Malus and a fairly big Dawn Redwood into the pots, to get more fine roots closer to the trunk. It worked pretty...

As I began learning more about bonsai, I stumbled across a concept you guys are all very familiar with, but was new to me: Air-Pruning. I learned about it while researching a local tree nursery that uses "The Rootmaker System" by reading the literature on their website. Pictured below is an...

Why are standard nursery/regular pots more popular than air pruning pots, in bonsai & gardening ? And this is a general observation, not specific to any location or country. Shouldn't the air pruning pots be the default standard everywhere, specially at pre-bonsai nurseries and tree nurseries ...