OK,...here's the thing. With fabric pots or 'rootbuilders' , like i use...the outside edges dry out much faster...this is the ONLY issue with them. That is the issue some members have had with them. However these 'rootbuilders i use are not soft, breathable fabric,..they are hard plastic , so roots get properly air pruned before they dry out near the outsides , like they do in regular fabric pots. Members have also said they don't like how the roots poke out of the bags and are harder to transplant with the roots holding onto the pots. I believe in my pots and i also believe in hard , plastic ones too.
If i had a choice between big fabric...or big plastic...i would go with the plastic, for the reasons i mentioned. That being said, when i remove the root mass from my pots the whole ball stays very much together because of the awesome , fibrous , root system that has been built by 'air pruning ' the roots. Cheers.