OK maybe not steps specifically but the point is that on a current Enduro you could get well inside of 1:55 on the Black Run Aston Hill whipping the jumps and then ride it straight back to the start (I know because I did so on Saturday). I’m not sure the 2003 Enduro could take that kind of beating although it too is a tough bike.
And the new Enduro is eminently suitable for full on Alps riding (and I don’t mean XC Zermatt to Chamonix at 3mph or mild Les Gets stuff, I mean the most full on descents and then climbing back up). The old one just isn’t tough enough for day in day out beating from those kind of rocks and roots. The suspension performs well enough but the frame itself is a bit on the light side (especially the seatstays and linkage – I broke both and replaced).
Also they’re getting on a bit, for second hand purchases. Mine was very well looked after and not ridden often, and not ridden hard (making the breakages described above more surprising), and the frame finally just failed earlier this year above the BB. I think any that have been ridden more than 20 times a year will be reaching the end of their serviceable life in the next year or two at the latest.
I’m not claiming that’s the end of it, that’s just my experience with them over about ten years or so. In any case this doesn’t touch on the OP’s query about the 2010s, which are unreal! Alpine 160 looks really good