Things that are different than my current 2006 ride...

* 29 vs 26 wheels

* Geometry has changed from the old days by a lot

* One-by transmission

* Tubeless fat tires

* Seatpost dropper

* Electronic shifting

* Through-axles on both ends

* Torque specs printed on the frame at the bolt

* 200mm disc brakes

* Adjustable linkage angles including the fork

did I mention geometry?

I rode S4 S5 today at my 6 feet zero inches tall  Shorter leg longer torso  S5 is it no doubt