I was sandbox testing some stuff yesterday and happened to notice that SACU's were actually really cheap at only 2.1k-1.95k mass. I realised I was so used to building the ras, combat, and other presets that I never actually bothered with default support commanders. And from what I've seen, most people go for the presets if they go for SACUs at all.
Is there ever a point in picking the general purpose unit instead of the more expensive upgraded ones?