What would be the modern equivalent for 2001 Specialized RockHopper?
RockHopper had aluminum frame, 26&quot; wheels, Shimano Deore / Deore-LX
derailleur, RockShox Judy front suspension, V-brakes, thin metallic
pedals.

I would consider this as mid-range from that era.
Judy forks have remained consistant in their pecking order (give or take) for all this time.
Similarly for Deore / LX. Could argue that LX is closer to modern SLX or even XT. But given that it was a mix before, it would be a mix now. IE not soley high-end.
I personally think that a modern replacement (like for new) would be either the Rockhopper Comp or maybe the Elite. (Deffo not the Expert).
Whether you choose the Comp or the Elite, is up to you. There really isn't much between them in terms of components, and there are arguments for either to be a match for your old one.