Dreamcast was early and cheap compared to PS2. PS2 was hyped about being very powerful. Wii U launched early and cheap, was weak and didn't sell. Original Xbox established itself in North-America despite the handicaps you mentioned (and several others), perhaps due to being very powerful. How many units MS sells if Xbox was not only later and weaker?
360 was not only early and cheaper, but around the same power level as PS3 and with better multiplatform versions. PS4 is more powerful than Xbox One.
PS2 had BC and a built in DVD player...those were really important factors at the time, I was working in sales and being able to buy a console and use your current games (PS1 being best selling console ever) was a big thing and getting a 'free DVD player. And you missed Wii but mentioned WiiU (which IMHO was not cheap). Also, OXB had a massive price drop which probably saved it...it also picked up some PC gamers (in particular those who wanted Halo) and of course the US buyers who liked to back their product. Also wasn't N64 more powerful than PS1?
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