When you look back at the original “X-Men” (2000), it’s a pretty solid underpinning to what has been one of the most stable franchises in recent filmdom. A traditional, good-but-not-great summer blockbuster that neatly sets the table for sequels, merchandising, etc. But you also see something else. The special effects are like a traditional movie, not like a video game. The music is symphonic, not like a pop/rock/hip-hop festival. It’s all so … analog. Not that that’s a bad thing. It’s just a little jarring to see how much has changed in action movies in a decade and a half.