Yep, and, as many wrote, mostly due to two shortcomings:
- Too little main RAM, this made ports of some HD multiplats impossible without major rewritings
- Motion Plus not present from the start: eventually its user base became large enough, even compared to the total Wii user base, to justify development for it, but it was too late, and Ninty itself developing little more than nothing for it made things even worse, why should 3rd parties have believed in it if Ninty itself didn't?
These two shortcomings, with their effects of keeping away some major hardcore titles, alienated hardcore gamers, otherwise Wii could have catered for all groups, casuals, Nintendo core gamers and hardcore gamers, except only graphic whore hardcores. And that's not all: WM+ features present from the start could have widened the "blue ocean", as more challenging, higher precision motion control games could have created a new market for "motion control hardcores" in a much more effective way than the late released PS Move did, as the latter, created at most a "blue pond" collecting too late some of the WM+ wasted opportunities (most probably, creating a true and bigger hardcore motion control market, not only WM+, but also PSMove would have thrived). Having by now lost the propelling force of the initial hype, now a hardcore market for high precision motion controls will be able to grow next gen, if all of the three or at least two competitors will include them as standard equipment, removing the handicap of split audience, but it won't ever be as big as it could have been, or maybe it will be in a distant future, when enough hardcores will have forgotten the initial hate.