When the Oklahoma City Thunder were denied entry to the NBA Finals last weekend, the members of the 2017-18 Warriors did not gather to pour champagne and toast to their achievement. Yet they had every reason to reappreciate themselves.Those Warriors won the Finals, becoming the fourth team in a 16-year span to achieve back-to-back championships — and the only one to reach five consecutive Finals. That gave them the right to claim a dynasty. And with each passing postseason, the feat looks even more impressive.With so many quality NBA teams failing to come close, do people understand how difficult it is to reach that level?“Hell no,” Shaun Livingston, who appeared in five straight Finals to finish his NBA career with the Warriors, told NBC Sports Bay Area this week.“Nah, man,” Marreese Speights, a member of Golden State’s Finals teams in 2015 and 2016, told NBC Sports Bay Area. “I don’t think people really understand the grind of it.”The NBA grind is grindier now than it was a few years ago. The space-and-pace game of today is taking a toll on bodies. Even as minutes are monitored more closely than ever, injury reports...