Differences Between T Slot and V Slot Aluminum Extrusions

T-Slot Aluminium Extrusion - 30x30mm PG30 Profile aluminum extrusions t slot Download scientific diagram Schematic illustrations of aluminum extrusion T-slot column profile from publication: Acoustical performance of ventilated aluminum extrusions t slot Although we reference 8020 brand t-slot extrusion data in this article, you could draw usable conclusions for other t-slot aluminum

aluminum extrusions tslot My question is - why use expensive extruded aluminum T-slot? I mean, for a CNC router it makes sense because you need sub-millimeter