That is pretty funny about the Lakers, but I think most of those series were in b etween the Shaq and Gasol eras, when the Lakers weren't an elite team, so not the best comp anyway. (They lost to the Lakers in 2010 in the West Finals, basically playing the D'Antoni system, but without him coaching the team They finally beat the Spurs that year as well).
I'm just saying, they had a chance to beat the Spurs in 07, they had home court, they were 2-2 and then they lose Amare and Diaw for a game, lose game 5 at home by 3, and lose the series. They made the West finals in 05, 06, and then lost that series in the West semi-finals in 07. Not a bad run, but yeah they didn't win a title.
It is interesting in how you define his system, because prior to say 1990 or so, most every NBA champion played at a faster pace than the D'Antoni Suns did. ( The 2005 Suns averaged 95 possessions per game. Just as an example, the Bad Boy Pistons averaged 95 possessions per game, and they were last in the league that year. So just to make that point again, the 2005 Suns, who were considered revolutionary because of the pace they played, would've been the slowest team in the league 15 years prior . And I grant it isn't just the pace, it was the amount of 3's they chucked, and the relatively small lineup they played, just making a point).
I sometimes feel like systems are focused on a little too much; should every team try and play the triangle because Phil won 11 titles with it? Is that the only system that can win a title? I don't think there is any question the middle of the decade Suns wouldn't have won more games if they played a different style; for the players they had, they had to play like that, and they were pretty successful, although they didn't win a title.
So I don't see why a team can't win a title playing what we can call a "D'Antoni system", but it's going to be pretty hard when A) there is only one team playing like that, and B) you need to beat a team that has Tim Duncan on it. I could just as easily turn it around and say they didn't win the title because you can't win a title without an elite superstar, and that was the failure, not the system. If their 2 guard was Kobe instead of Raja Bell, they probably win a title, system be damned.
I guess this is all a long winded way of saying I guess i don't know for sure, but I think the biggest reason the Suns didn't win a title was Tim Duncan, not the pace they played at.