CW: absurd age gap between the Jim Phelps character (John Voight) and the character's on-screen wife (Emmanuelle Béart)
This is old and looks it.
They use payphones. The sequence where Hunt uses "The Internet" probably looked a bit silly then and is simply ludicrous now.
The famous tentpole scenes: the dangling in the secure room and the helicopter in the tunnel look very tame.
However, structurally it probably did define a turning point in action movies shifting into the noughties. Its twisty plot layered on top of scenes which are in isolation simple action fare is a big step up from a lot of 90s stuff.
Overall still good 7/10 but a weird kind of period piece.