The problem was even lets say AT&T was willing to put BSD on pc style hardware they were wildly overpricing it. If you were dead set at that time having a PC you could kit one out for ~2k which was respectable for the time. Yet then AT&T would come along and say 'oh you want BSD? 20,000 please, oh and that PC you got well it does not work correctly with it you need to buy a different set of kit that is 8x the cost, plus a 40k per year support cost'. AT&T is and was a phone company through and through. I have worked at the leftovers of another one. They only care about one thing, number of lines hooked up. Their sales staff and training is all about that. How can software sell me more lines. It is one of the metrics that they look at. A few thousand PC sales? A blip on the balance sheet and probably not really worth investing in because it does not sell more lines. Phone companies are laser focused on that.