@Gizzzzy, Might be because indoor they maybe keep the roots warmer? Whereas outdoors (warm/hot climates) maybe fabric is the better option for a long (root pruning) and hot (cooling roots down) growing season.
Regardless, looking very good π²πͺπ
@Smartie, She is massive !! Tbh I've always preferred plastic pots, I do have 10L fabrics in there too but I always seem to get bigger in plastic πββοΈπ€£π