Analytics are right until they're wrong.
What does this even mean? "Analytics" would only be wrong if basketball stopped being a #s game.
The Spurs biggest issue is personnel in that their best players just aren't comfortable outside the three point line so you make due with what you have. Pop has shown over the years to adjust his style of play to what's on the roster. They really only need to keep one of Demarr or Aldridge, having both is going to hurt them going forward.
When has Pop ever shown to ever adjust his style to his roster? Not that there's anything inherently wrong with it, but the Spurs have always been a methodical, stringent, and structured team, who've had the same system in place for decades, and the players either get on board or are either phased out of the rotation, traded, or let go.
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Their best players just aren't comfortable outside the 3-pt line", and you think every other team's main players are? Of course not. That's why players work on their games and expand their skillsets to get more comfortable. LMA was working on his 3-pt shot all summer long, but strangely only attempted 0.5 per game this season. Blake attempted 7 threes a game at 36% this season, do you think he was ever a player who was comfortable outside the 3-pt line, or did he and the coaching staff (from LA to Detroit) adjust his game to benefit the structure/flow of the offense he was the main option scorer on? Why doesn't Pop/Spurs do this with LMA? Why are the Spurs the only team in the league who shoot more long 2s than 3s? Does every other team have these great, natural shooters to lead them, and the Spurs the only team who doesn't?