The Warriors are rolling into Phoenix with something they haven't consistently had this season: momentum. The question is whether they can keep it — or whether Father Time finally sends an invoice.

Let's be real about the situation. Golden State has shown flashes of the dynasty-era magic, stringing together gutsy performances and building the kind of series-to-series momentum that once felt inevitable. But there's a critical asterisk here: when the Warriors were doing this regularly, Steph Curry and Draymond Green were in their 20s. They're decidedly not in their 20s anymore.

The "hangover game" is a real phenomenon in the NBA, and it's one that disproportionately punishes older rosters. Young legs recover. Veteran legs negotiate. After an emotionally and physically draining stretch, the Phoenix matchup has all the hallmarks of a classic letdown spot — a road game against a talented opponent, arriving right when the adrenaline wears off and the cortisol kicks in.

None of this is to say the Warriors can't win. Curry remains one of the most dangerous players on the planet on any given night, and Green's basketball IQ doesn't age the way his knees do. But the margin for error is razor-thin. This isn't the 2017 squad that could sleepwalk through a Tuesday in Phoenix and still win by 15.

The broader question for the rest of the season is whether Golden State can sustain momentum without the physical luxury of youth. Effort and experience can compensate for a lot — but not everything, and not forever.

For Warriors fans, the formula is simple: enjoy the momentum while it lasts, but don't be shocked if Phoenix catches them on a night when the legs just aren't there. Championships are won by teams that find ways to win the games they're supposed to lose. Tonight, we'll find out if this version of the Warriors still has that in them.