Ok happy to stand corrected but that is still 9.6% CAGR and well above inflation on a rapidly depreciating asset (ignoring maintenance).
Like I said though, and as others have said, that’s not a fair comparison. The 2000 S-Works had an alu frame, Manitou SX forks with elastomers, an XT/XTR mix, Mavic 517 rims, v brakes and some basic in house alu finishing kit. You now get a full carbon frame, fork CSU, rims, seatpost, bars, transmission parts, cranks etc, properly working suspension with inertia valves and that, and it still weighs a lot less than 10 years ago.
How much would you pay for an aluminium v braked FS with elastomer forks? £2000? I think not.